Published on in Vol 7 , No 11 (2018) :November

Preprints (earlier versions) of this paper are available at, first published .
Self-Monitoring by Traffic Light Color Coding Versus Usual Care on Outcomes of Patients With Heart Failure Reduced Ejection Fraction: Protocol for a Randomized Controlled Trial

Self-Monitoring by Traffic Light Color Coding Versus Usual Care on Outcomes of Patients With Heart Failure Reduced Ejection Fraction: Protocol for a Randomized Controlled Trial

Self-Monitoring by Traffic Light Color Coding Versus Usual Care on Outcomes of Patients With Heart Failure Reduced Ejection Fraction: Protocol for a Randomized Controlled Trial


1Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

2Heart Failure Clinic, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

3Department of Health Science Education Development, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

4Golestan Research Center of Gastroenterology and Hepatology, Golestan University of Medical Sciences, Gorgan, Islamic Republic Of Iran

5Department of Medical Surgical Nursing, School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

6Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

7Department of Critical Care Nursing, School of Nursing and Midwifery, Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran

Corresponding Author:

Masoumeh Zakerimoghadam, MSc, PhD

Department of Critical Care Nursing

School of Nursing and Midwifery

Tehran University of Medical Sciences

Tohid Square, Nosrat Street

District 6


Islamic Republic Of Iran

Phone: 98 912 540 4964


Background: Patients with heart failure (HF) reduced ejection fraction (HFrEF) have symptoms that are more severe and experience a higher rate of hospitalization compared with HF preserved ejection fraction (HFpEF) patients. However, symptom recognition cannot be made by patients based on current approaches. This problem is a barrier to effective self-care that needs to be improved by new self-monitoring instruments and strategies.

Objective: This study describes a protocol for the self-monitoring daily diaries of weight and shortness of breath (SOB) based on the traffic light system (TLS). The primary objective is to compare the self-care between the intervention and control group. Comparison of HF knowledge, HF quality of life (HFQOL), and all-cause hospitalization between the 2 groups are the secondary objectives.

Methods: A single-blind randomized controlled trial is being conducted at the HF clinic at Tehran Heart Center (Tehran, Iran). Sixty-eight adult patients of both genders will be enrolled during admission to HF clinic. Eligible subjects will be assigned to either the intervention or control group by a block balanced randomization method. Baseline surveys will be conducted before random allocation. Participants in the intervention group will receive an integrated package consisting of (1) HF self-care education by an Australian Heart Foundation booklet on HF, (2) regular home self-monitoring of weight and SOB, and (3) scheduled call follow-ups for 3 months. Patients in the control group will receive no intervention and they only complete monthly surveys.

Results: This study is ongoing and is expected to be completed by the end of 2018.

Conclusions: This is the first trial with new self-monitoring instruments in Iran as a low and middle-income country. If the findings show a positive effect, the package will be applied in different regions with the same health care status.

Trial Registration: Iranian Registry of Clinical Trials IRCT2017021032476N1; (Archived by WebCite at

International Registered Report Identifier (IRRID): PRR1-10.2196/9209

JMIR Res Protoc 2018;7(11):e184



Heart failure (HF) is a complex clinical syndrome that results from any structural and functional impairment of ventricular filling or ejection of blood. Based on left ventricle dysfunction and the left ventricle ejection fraction (LVEF), HF can be categorized as preserved ejection fraction (with LVEF≥50%, known as HFpEF or diastolic HF) and reduced ejection fraction (with LVEF ≤40%, known as HFrEF or systolic HF) [1].

As a global burden, HF affects more than 37.7 million individuals worldwide [2] and is a common condition with 1%-2% total health resources allocated in high-income countries. In low- and middle-income countries (LMICs) like Iran, HF may displace infectious diseases as the major public health issue [3]. In Iran and other Asian LMICs, HF is described as a pandemic [4], the prevalence greatly increased with age and range between 0.5% to 9.0% among different cities, regardless of time distribution [5], thus supporting the need for better HF surveillance and management strategies [3]. Patients with HF can experience various clinical outcomes including mortality, morbidity, and other patient-reported outcomes [6]. Although mortality and morbidity rates are similar for HFpEF and HFrEF, the hospital admission rates in patients with HFrEF are much higher than HFpEF [7].

HF is a leading cause of hospitalizations [8], mortality [8,9], rising health care costs (over US $39 billion annually in the United States and US $53.1 billion by 2030) [2,8-10], suboptimal self-care behavior [11], and reduced quality of life (QOL) [12]. According to a recent European Society of Cardiology Heart Failure Long-Term Registry prospective observational study, the rate of all-cause mortality and hospitalization at one-year follow-up was 8.1% and 28.2%, respectively [13]. Compared to Western countries, patients with HF in Asia and Iran are younger, have more severe signs and symptoms, and receive lower levels of treatment compared to the European Society of Cardiology and American College of Cardiology Foundation/American Heart Association Guidelines [14]. Moreover, Callender et al [3] reported that Iranian patients with HF experience significantly lower rates of admission (0.3%).

Poor self-care and low QOL among patients with HF are major global health issues [11] that are also affecting Iran [15-17]. Adequate self-care is associated with an improved health status [18], fewer symptoms, higher QOL [19], and reduced hospitalizations [18]. A lack of knowledge of symptom recognition and psychological problems have been identified as 2 key barriers [20]. Therefore, effective educational methods are essential for improved self-care [11,20]. Previous studies have shown that self-care programs for patients with HF are most effective when specialized education is combined with symptom monitoring and response management [21,22]. Practical and user-friendly self-monitoring tools can help patients recognize, monitor, report, and manage the symptoms appropriately. Without these tools, HF decompensation may not be detected in the early stages and could lead to preventable hospitalizations [23].

Patients with HF experience weight gain and other serious decompensation symptoms including shortness of breath (SOB) due to pulmonary edema, fatigue, and leg swelling [24-26]. Weight gain resulting from fluid retention is a marker of HF decompensation, and therefore, frequent weight monitoring can identify high-risk periods in the early stages to prevent hospitalization [24]. However, low compliance with weighing has been reported among patients with HF [27].

Diaries in a textual/tabular format are acceptable and creative self-monitoring tools because they reinforce patient education and facilitate their disease management [28]. Improved HF clinical and hospital outcomes have been reported by weight and symptom self-monitoring diary users [29]. However, despite the lower rate of HF-related hospitalizations [21,30], reduced mortality rate [21], and improved self-care [22], the previously reported studies used tabular format diaries and were conducted in developed countries with a higher quality of health care. The results may not apply to developing countries with significantly different health care systems and levels of health care quality.

Graph format diaries have been reported to attract and hold a person’s attention for more extended periods and are the preferred format due to improved patient comprehension and information extraction [31]. Recently, a traffic light system (TLS) of diaries in graphical format have been developed [32]. The system consists of 3 different color codes: (1) red for medical alert, (2) yellow for a situation that is worsening and requires the patient to take quick-relief medications, and (3) green to show that the patient is doing well and adequately adhering to the treatment plan [33]. The TLS has been shown to be more effective in transforming information on risk assessment and disease management [32].

Wakefield et al [23] employed a pretest-posttest longitudinal design study to assess weight, and SOB self-monitoring by graphical instrumentation (other than TLS) in patients with HF. The paper revealed that self-monitoring HF patients could not complete the appropriate actions for each zone. Consequently, new strategies and instruments to actively engage patients in symptom recognition and monitoring require further research [23].

This study will combine graphical and tabular formats with TLS color coding to design weight and SOB self-monitoring diaries. Each color zone has been designed for patients to perform specified actions following symptom monitoring. The efficacy of this intervention will be compared with the usual care for patients with HF. This is the first practical study with new user-friendly self-monitoring tools that will be conducted in Iran as an LMIC to compare the primary outcome of self-care behavior and the secondary outcomes of HF-knowledge, QOL, and all-cause hospitalization between intervention and control groups.

Study Design

This study is a parallel, single-blind, randomized controlled trial. The study protocol has been reviewed and approved (No. 9411449005) by the Institutional Review Board (IRB) at Tehran University of Medical Sciences (TUMS, Tehran, Iran). The study protocol is based on the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) 2013 guideline [34].

Study Setting

This study will be conducted at the Tehran Heart Center (THC) HF clinic affiliated with TUMS. THC is one of the best equipped diagnostic and therapeutic cardiology centers with full-time specialists and well-trained nursing staff in the region and is a referral center for cardiology in Iran with more than 1,300,000 outpatient visits, and 280,000 patient hospitalizations from 2001 to the end of 2017 [35].

Eligibility Criteria

The research nurse (author MN) will screen the medical records of adult patients (≥18 years of age) of both genders for the following inclusion criteria in the HF clinic. The eligibility of each participant will be confirmed by the HF specialist (see Textbox 1).


In this study, the intervention is an integrated package consisting of 3 components: (1) HF self-care education, (2) regular home self-monitoring of weight and SOB, and (3) scheduled call follow-ups.

The first component of the package includes HF self-care education that will be delivered in the HF clinic of the THC according to the Australian Heart Foundation educational booklet entitled “living well with chronic HF” [38]. Individual education will be provided by the research nurse (MN) according to the participants understanding and literacy for a 40-minute face-to-face session between 8 am to 1 pm. A Farsi version of the booklet will be given to each participant. Also, during the educational session, the instructor and the participant will review the booklet content together, and the instructor will answer any questions. The booklet contains information on disease definition, diagnosis, symptoms, and ways to manage them, lifestyle issues, medicines, and other treatments. In order to obtain permission to translate the booklet to Farsi language for local use in Iran, one of the authors (MN) contacted the Australian Heart Foundation on April 5, 2016. After obtaining permission, it was translated to the Farsi language by an individual who was also proficient in the English language and knowledge of cardiovascular terminologies. Two nursing faculty members and 2 cardiology faculty members affiliated with TUMS approved the Farsi version of the booklet.

Participant eligibility criteria.

Inclusion criteria

  • Definitive diagnosis of heart failure by an heart failure specialist documented on the clinical record
  • Heart failure reduced ejection fraction where ejection fraction ≤40% [36,1] by any method (transthoracic, or transesophageal echocardiography, and angiography)
  • New York Heart Association function class II-IV
  • Access to a telephone, telegram mobile application, and ability to answer phone calls
  • Ability to read and write in the Farsi language
  • Having a functional weighing scale (digital or analog) at home to weigh daily [23]
  • The absence of diagnosed hearing loss and sight defects
  • A stable hemodynamic status
  • Non-smoking, no drinking alcohol, and no addiction to drugs
  • Living at home and not in a homeless shelter [37]

Exclusion criteria

  • Diagnosed psychiatric and cognitive conditions during the study
  • Sudden death, migration, or unavailability of patients during the follow-up phase
  • Recording weight and shortness of breath in the daily diary for less than 60% (<54 days) during the study
  • Undergoing cardiac or other kinds of surgery with a lengthy hospital stay during the study
  • Awaiting or receiving a transplanted heart or a left ventricular assistive device
Textbox 1. Participant eligibility criteria.

The second component of the package includes regular home self-monitoring of weight and SOB and recording them in the appropriate 3-color daily diaries for 3 months. Since the graphical display of values help patients to recognize their symptoms and contact their health care provider [23], we created a paper-based weight and SOB self-monitoring daily diary color-coded system that was analogous to TLS.

Based on previous studies, a graphical representation of health-related information is the preferred method for patients compared to numerical/tabular displays [39,40] for communicating medical risk information [41]. This approach results in better participant comprehension. The patient pays attention and extracts more information with less effort [31]. Thus, both research diaries have been designed in 3 colors and categorize the participants’ condition into 3 color-coded zones: green (excellent), yellow (use caution), and red (warning). The green, yellow, and red color-coded zones have been defined based on a combination of American Heart Association self-check plan for HF management [42] and the HF self-monitoring toolkit [43]. The colored diary will display recorded data in both graphical and tabular format. It is expected that this will result in a better participant understanding of their condition.

In the HF clinic, participants will be instructed by the research nurse on the daily measurement of weight and SOB and recording them in the daily diary during a 20-minute individual session between 8 am and 1 pm. The weight diary is a 7-page colored diary with instruction on the first page followed by 6 blank pages to record daily weight for 15 continuous days on each page.

At the time of referral to the THC, the HF specialist will measure the weight of eligible participants by analog weight scale (RASA scale, model 230, Iran). Then, 2 upper control limits will be determined for participants by the research nurse to identify 1 and 2.5 kg greater than the baseline weight that is considered as yellow and red zones in the weight diary, respectively [23] (see Figure 1). During instruction, the participants will be asked to weigh themselves daily after going to the toilet, before breakfast, with the same type of clothing, at the same time [38] and record it regularly in the weight diary for 3 months. If participants miss a weight measurement for any reason, they will be asked to record the reason for the missed date. They also will be instructed to contact the research nurse in case of sudden weight gain of 1 kg in one day (yellow zone) and 2.5 kg in one week (red zone) [44].

The SOB diary is a 4-page colored diary that includes instructions on the first page and 3 blank pages to record the difficulty of breathing for 30 continuous days on each page. The participants will be instructed on how to use the SOB colored diary, and how to rate the difficulty of breathing for the entire day after taking evening medications and at the end of each day for 3 months [23]. They will also be instructed to record the reason for any missed measuring dates.

The SOB rating scale was designed based on 0 to 10 pain assessment visual analog scale. In this scale, scores are categorized as follows: none (0), mild (1-3), moderate (4-6), and severe (7-10) [45] that have been marked by green, yellow, and red colors, respectively. Green, yellow, and red color zones will be explained to participants as no new or worsening (none-mild SOB), worsening with activity or at night when lying down (moderate SOB), and struggling to breath or at rest or while sitting (severe SOB), respectively [42] (see Figure 2). Participants will be instructed to contact the research nurse if they reach the yellow color zone to increase the diuretic dosage and contact with the emergency medical services in the red color zone [38].

The third component of the package includes scheduled follow-up phone calls (days 1, 3, and 7 after referral to the HF clinic and every week after that) for 3 months [21]. The research nurse will give participants a list of call dates and will call each subject in the evenings between 6 pm and 9 pm. Each follow-up phone call will last 5-15 minutes [21] and is designed to review the content of the instructional session, encourage participants to continue weight and SOB self-monitoring, and record them in the daily diaries. Also, the research nurse will ask the participants about the color zone during the previous week and will recommend the appropriate action (see Figure 3). Also, we predict that during the call follow-ups, participants in the intervention group will report another symptom that may be due to a side effect of the medications or the disease. The research nurse will be able to provide the appropriate recommendation for each symptom reported in the intervention group during these (see Figure 4).

At the end of the one-hour instructional session in the HF clinic, a plastic folder containing the instructional booklet, weight, and SOB colored diaries, pen, pencil, eraser, and a pencil sharpener will be delivered to each subject in the intervention group. They will be asked to keep diaries clean and deliver them to the research nurse at the end of the study.


After randomization and allocating participants to 2 groups, those in the control group will receive the usual care. In HF clinic at THC, usual care for patients with HF is limited to a brief instruction by HF specialists on limiting water and salt intake, taking medications as prescribed, physical activity, weight monitoring and increasing the diuretic dosage in the condition of peripheral edema, weight gain, and SOB. They will receive 1 monthly phone call for 3 months. Out of respect for the ethical principles of human research, HF self-care instruction will be provided to the participants in the control group, and they will receive an educational booklet at the end of the study.

Figure 1. Colored weight daily diary. EMS: emergency medical services.
View this figure
Figure 2. Colored shortness of breath daily diary. EMS: emergency medical services.
View this figure
Figure 3. Flowchart of actions recommended by research nurse based on color zones of each subject's self-monitoring daily diary during call follow-ups. ED: emergency department; EMS: emergency medical services; SOB: shortness of breath.
View this figure
Figure 4. Flowchart of the research nurse recommendations for each symptom reported by subjects in the intervention group during the call follow-ups.
View this figure

Study Measures

Primary Outcome
Self-Care Behavior

Effective self-care improvement is a priority of all clinicians caring for patients with HF [46]. In a developing country like Iran, there is a growing need to improve patient’s self-care [15]. However, there is a low rate of reported admissions for HF in Iran [3]. Thus, in contrast to previous studies where hospitalization was considered the primary outcome [21,22,30] and self-care as the secondary outcome [21,22], self-care has been identified as the primary outcome in this trial.

Self-care behavior will be measured by the Self-Care of Heart Failure Index (SCHFI) version 6.2 [47] by self-reporting at baseline and monthly intervals for 3 months. SCHFI was translated into Persian and validated for Persian speaking people by Siabani et al in 2014 [48]. It consists of 3 separate scales and 22 questions: 10 for self-care maintenance, 6 for self-care management, and 6 for self-care confidence [49]. Cronbach alpha was determined for self-care maintenance (.56), management (.64), and confidence scales (.79) [48]. Scale scores can range between 0 to 100, and a score ≥70 will be considered as adequate self-care [49]. We will ask participants to complete SCHFI by themselves at baseline and then monthly for 3 months.

Secondary Outcomes
Heart Failure Knowledge

In order to assess the effect of education and counseling on knowledge of participants with HF, the Dutch Heart Failure Knowledge Scale (DHFKS), with Cronbach alpha=.62, will be used. This scale consists of a 15 multiple-choice self- administered questionnaire concerning: general knowledge on HF (4 questions), knowledge on HF treatment (6 questions on diet, fluid restriction, and activity), and symptoms and their recognition (5 questions). The participants will be asked to choose the correct option from the three choices. The minimum score for this scale can range from 0 (no knowledge) to a maximum score of 15 (excellent knowledge) [50].

While there is no Iranian version of this scale, it was translated into the Persian language by forward-backward translation methods after obtaining permission from the scale developer [50]. The face and content validity were evaluated by an expert’s opinion and discussion with patients with HF. The reliability was assessed through a pilot study among 30 patients with HF (Cronbach alpha=.62). This coefficient alpha was identical to the original one, and the internal consistency could not be improved by deleting any of the 15 items [50]. Thus, all items have been retained. Participants will be asked to provide answers to the DHFKS by themselves at baseline and the end of the study.

Quality of Life

Heart failure quality of Life (HFQOL) will be assessed by the Iranian version of the Minnesota Living with Heart Failure Questionnaire (MLHFQ) with Cronbach alpha=.95 [51]. The psychometric properties of the questionnaire were evaluated by Middel et al in 2001 (Cronbach alpha≥.80 for the scales) [52]. The MLHFQ consists of 21 questions with a 6-point Likert scale ranging from 0 (without limitation) to 5 (maximum limitation). It consists of physical and emotional dimensions. The physical dimension is the sum of the question scores (questions 1 to 7, 12, 13) while the emotional dimension is based on questions 17 to 21. Questions 8 to 11 and 14 to 16 are related to lifestyle, financial situations, and side effects of medications. The total is the sum of the 21-question score, and a lower score reflects better quality of life [53]. Since this instrument assesses HFQOL in the previous month [54], we will ask participants to complete MLHFQ by themselves at baseline and then monthly for 3 months.

All-Cause Hospitalization

Data related to all-cause hospitalization during the previous month (ie, cause, date of admission, discharge, and length of stay) will be obtained from participants in both groups by an outcome assessor blinded to study group assignment during monthly call follow-ups. In the case of admission to other health care settings except for THC, data will be collected according to the participants’ self-reporting. If the participant is admitted to THC, data will be confirmed by the hospital information system following participant self-reporting.

Causes of hospital admissions will be classified according to 3 categories of cardiac admission for HF: SOB and edema relieved by diuretics, other cardiac causes (ie, chest pain, arrhythmias, or syncope), and non-cardiac causes [21]. All-cause hospital admissions will be obtained by trained research assistants who are blinded to the allocation.

Data Collection

Eligible patients will be asked to read and sign a written informed consent form. The research nurse will then collect demographic and clinical characteristics by participant self-reporting and from a medical chart and then record these in data collection forms (see Table 1). Also, participants will be asked to complete baseline surveys (SCHFI, HF knowledge, HFQOL, and health literacy) by themselves in the HF clinic before randomization.

In order to assess participant health literacy, we will use the Heart Failure-Specific Health Literacy Scale with Cronbach alpha=.71. It consists of 12 items each with 4 possible scores (1 to 4): inapplicable (1) to strongly applicable (4) where a higher score indicates a higher level of health literacy except items 1 to 4 [55]. The Iranian version of this scale was prepared after getting the developer’s permission. Thus, it was first translated into Persian by a forward-backward translation method. Then, face and content validity were approved by an expert’s opinion (nursing faculty, nurse practitioners, and cardiologists) and discussion with patients with HF. A pilot study was conducted to assess the reliability with 30 HF patients and where a Cronbach alpha value of .77 was determined. Deletion of items could not improve the value similar to the original scale. Therefore, we decided to retain all items [55]. We will ask the participants to complete the health literacy scale as a baseline survey.

In order to measure the HF knowledge at the end of the study, monthly self-care behavior, and the HFQOL, the outcome assessor will be blinded to study group assignments. The assessor will send the DHFKS, SCHFI, and MLHFQ to the participants in both groups by telegram mobile application in the morning of each monthly call follow-up and ask them to send answers before 6 pm of the same day.

Participant Timeline

The SPIRIT 2013 template was used to schedule enrolment, interventions, and assessments (Table 1) [34]. A schematic representation of the study design is shown in Figure 5.

Table 1. Time schedule for enrolment, interventions, and assessments in this study.
Time pointStaff memberStudy period

Enrollment: -t1aAllocation: 0Post-allocationClose-out: txb


Eligibility screenResearch nurse and HFe specialistf

Informed consentResearch nurse and HF specialist

Baseline characteristics and surveysResearch nurse
AllocationResearch nurse

Integrated package plus usual careResearch nurse

Usual care
Assessments (demographic/clinical)

Age (years)Research nurse

Gender (male/female)Research nurse

EthnicityResearch nurse

Marital status (married/single)Research nurse

IncomeResearch nurse

Level of education

ElementaryResearch nurse

High schoolResearch nurse

AcademicResearch nurse

HF-Specific Health Literacy ScaleResearch nurse

Body mass index (kg/m2)Research nurse

Job (yes/no)Research nurse

Insurance (yes/no)Research nurse

Time with HFResearch nurse

HF etiology (yes/no)

Ischemic heart diseaseResearch nurse

CardiomyopathyResearch nurse

HypertensionResearch nurse

Heart valve diseaseResearch nurse

NYHAg functional class (II–IV)Research nurse

Previous hospitalization (yes/no)Research nurse

Hospitalization last 3 months? (yes/no)Research nurse

Charlson comorbidity indexResearch nurse

Ejection fraction (%)Research nurse

Systolic blood pressure (mm Hg)Research nurse

Diastolic blood pressure (mm Hg)Research nurse

Heart rate (bpm)Research nurse

Daily weight measure (yes/no)Research nurse

Medications (yes/no)

Angiotensin-converting enzyme inhibitorResearch nurse

Angiotensin receptor blockerResearch nurse

DiureticsResearch nurse

AspirinResearch nurse

StatinsResearch nurse

Vitamin k antagonistsResearch nurse

AllopurinolResearch nurse

Beta blockerResearch nurse

DigitalsResearch nurse

Implantable cardiac devices (yes/no)Research nurse

Prior cardiac surgery? (yes/no)Research nurse

Arrhythmia in electrocardiography? (yes/no)Research nurse

Laboratory parameters (serum)

SodiumResearch nurse

PotassiumResearch nurse

UreaResearch nurse

CreatinineResearch nurse

Uric acidResearch nurse

HemoglobinResearch nurse

HematocritResearch nurse

Fasting blood glucose levelsResearch nurse
Baseline surveys

Self-Care of HF IndexResearch nurse

Minnesota Living with HF QuestionnaireResearch nurse

Dutch HF Knowledge ScaleResearch nurse
Primary outcome: Self-Care of HF IndexResearch assistant
Secondary outcomes

HF knowledgeResearch assistant

HF quality of lifeResearch assistant

All-cause hospitalization (yes/no)Research assistant

a-t1: Time at enrollment.

btx: Time at the end of study.

ct1: Time at allocation.

df1: Time at first month follow-up; f2: Time at second month follow-up; f3: Time at third month follow-up.

eHF: heart failure.

fNot applicable.

gNYHA: New York Heart Association.

Figure 5. Schematic representation of the study design. HF: heart failure.
View this figure

Sample Size

In this study, the sample size was calculated based on the minimal clinically important difference (MCID) approach for self-care as measured by SCHFI for the primary outcome. No specific MCID for SCHFI was available to the best of our knowledge and based on our search of the PubMed database.

The suggested MCID for assessing dyspnea with the visual analog scale (0-100 score index) was the range 10-20 [56]. Thus, improving self-care for ≥10 scores from the baseline at the end of the study has been considered as MCID for the present study in order to reach a large sample size. According to the Jurgens et al [22] study in 2013, a mean of 70.8 for self-care in the control group at the end of study (90-days) and a fixed standard deviation of 27.2 (the largest SD) have been considered. In order to calculate sample size by G*Power free software (version, the input parameters are as following: effect size (Cohen f) of 0.168, the alpha error probability of .05, a statistical power of 80% to detect MCID≥10 scores between the 2 groups at the end of the study, 3 times measurement of outcome with monthly intervals, and a correlation coefficient of .5 among repeated measurements. Thus, by considering the overall attrition rates of 10%, the sample size was set at 68 participants (34 participants in each group).

Participant Recruitment

During the run-in phase of the study, the research nurse at the HF clinic will be present Sunday through Wednesday of each week from 8 am to 1 pm. The nurse will screen the patients for the eligibility criteria at the time of admission. Participant screening will continue until the target population is achieved. Simultaneously, an HF specialist will confirm the subject`s eligibility and adjust the drug dosages of the eligible participants. Also, the specialist will provide each patient with additional details about the study. This is our main strategy for achieving adequate participant enrollment.

Allocation: Method and Concealment Mechanism

The block balanced randomization method will be used for allocation. Before initiation of the run- in phase of the study, the statistician (AAK) will generate the randomization plan by website [57]. Therefore, twenty blocks of 4 for both the intervention group (group A) and the control group (group B) will be prepared. The statistician will fold the paper containing 4-size blocks 2 times, put them in the standard envelopes and write the serial numbers on them. All envelopes will be kept at the recruitment center. Thus, for every eligible patient, the research nurse randomly selects one of the envelopes after shuffling and assign participants into intervention and control groups.


Due to the nature of the intervention, it is impossible to blind the participants assigned to the study groups to the data collector. However, the outcome assessor will be blinded and instructed not to ask the participants whether or not they received the intervention.

Data Management

Data will be collected in paper format. A file for each subject will be stored in numerical order in a secure place and manner. Files will be maintained at the recruitment center for 3 years after completion of the study. The statistical expert will prepare the data generated by the IBM/SPSS statistical software (version 16). This expert will train the data clerk to enter the data by specific codes and labels. Also, after finishing the data entry, all data will be double checked. All forms related to the study will be kept in a locked cabinet with restricted access in the recruitment center. All reports will be prepared in a manner in which no individual participants can be identified.

Data Monitoring

Three researchers from TUMS not involved in the study and chosen by the university will monitor data and supervise the conduct of the study.

Statistical Methods

Statisticians will prepare the data sheets to collected data. Data will be entered into the SPSS software (version 16). The Kolmogorov-Smirnov test will be used to normality. A transformation approach will be used to handle non-normal distribution. For the between-group comparison of continuous and categorical baseline characteristics, independent t test and chi-square test will be used. For categorical variables between the 2 groups, the two-tailed Fisher exact test will be used instead of the chi-square test in the case of too small expected cell frequencies. A P value <.05 will be considered statistically significant.

Primary Analysis

Baseline scores for each scale of SCHFI including self-care maintenance, management, and confidence will be compared in both groups by an independent t test. Due to the measurement of self-care behavior at baseline and at monthly time intervals, we will calculate the mean of monthly self-care scores in order to compare the mean of self-care behavior after the intervention in both groups. Also, because of the frequent measurement of self-care behavior, we will also use P value correction based on the Bonferroni method [58]. A linear logistic regression procedure will be applied to determine the factors affecting self-care behavior. The odds ratio will be reported with 95% CI.

Secondary Analysis

Independent t tests between 2 groups will compare the mean of the HF knowledge score before and at the end of the study. The HFQOL at baseline and at monthly time intervals will be compared by the P value correction based on the multiple comparisons.

In order to describe the surveillance, the median of admissions to health care settings will be used. Also, the Kaplan-Meier survival analysis will be applied for a descriptive comparison of the surveillance and, a log-rank test will be used to detect the significance difference between the 2 groups. A hazard ratio will be reported with 95% CI.

Ethics Approval and Consent to Participate

The study protocol, data collection forms, educational booklet, and the template of informed consent form was reviewed and approved by the Research Ethics Committee (REC) at TUMS on February 5, 2017 (No. IR.TUMS.FNM.REC.1395.1653). Researchers are committed to updating the agreement with the IRB and REC at TUMS for any administrative and methodological changes of the study protocol which may affect the study.

In order to obtain the informed consent, the research nurse and HF specialist will introduce the trial to each eligible participant. Every eligible participant will receive an information sheet and a written informed consent. The research nurse will then obtain written informed consent from all participants willing to participate in the trial.

The participant informed consent form will be prepared according to the Declaration of Helsinki. It gives the subject information on what the research is about and what happens following participation in the study. It contains information on “purpose of the trial, potential benefits and risks; subject`s right to refuse participation or to withdraw consent at any time; institutional affiliation and potential competing interests of the researcher; and sources of trial funding” [59].

One critical issue that the researchers will be experiencing is posttrial care. Due to the nature of the intervention, this trial will not have any harm for participants that need to be treated during or after the trial. However, the HF specialist is the responsible physician and will assess and manage participants in the event of worsening of the symptoms.

Availability of Data and Material

All study-related forms will be stored securely in the recruitment center by code number. Informed consent containing names and other personal identifiers will be stored separately from the forms identified by code number.

Intellectual property of the data belongs to the TUMS research and technology deputy. Thus, the final trial dataset/analysis will be available from the corresponding author upon request and by permission of the TUMS research and technology deputy.

This paper is the first version of the protocol that has been submitted. At the time of manuscript submission, the trial is actively enrolling the participants, and the recruitment started on June 11, 2017. The study is expected to be completed in November 2017. Data will be analyzed and published by the end of 2018.

The major concerns among patients with HF are the lack of information on the medications, worrying about both the quantity and combination of prescribed drugs, having trouble differentiating between the side effects of medications and symptoms of HF, and the lack of knowledge required to interpret symptoms or treat worsening symptoms [60]. The most critical participant issues are poor accessibility to a health care provider, receiving poor follow up, and having poor medication adherence [61].

Due to the nature of the intervention and the application of an integrated package including self-care educational booklet, graphical self-monitoring diaries based on TLS, and scheduled call follow-ups, we expect that this trial will address the patients’ concerns and issues.

We anticipate that the self-care educational booklet will improve the patient`s knowledge of HF. Graphical colored self- monitoring weight and SOB diaries will improve the patients’ ability to recognize their HF symptoms and help them determine the appropriate action whenever symptoms worsen. Also, scheduled call follow-ups will allow the patients to ask questions related to the disease, treatment options, and adverse effects. This will help them with referral to the proper health care setting in the early stages of the disease decompensation.

Iran is an LMIC and its health care system provides for only a brief verbal self-care instruction without any follow-up calls to patients with HF. Thus, at the end of this trial, patients in the intervention group and their caregivers may feel they are being deprived of standard care and a lack of support.

Thus, if the research findings provide positive effects, this practical intervention will be implemented for patients with HF in Iran and other countries similar to Iran. Also, the results of the research project plus the integrated package will be delivered to the noncommunicable diseases center at the Iran Ministry of Health, Education, and Treatment for consideration in the usual care of patients with HF.


This study protocol relates to the thesis of MN for an MSc degree in Critical Care Nursing (no. 882) at Tehran University of Medical Sciences (TUMS). We thank the Educational, Research and Technology Deputy and the Critical Care Nursing Department at the School of Nursing and Midwifery affiliated with TUMS for the thesis approval. We also thank the Noncommunicable Diseases Research Center (NDRC) of Endocrinology and Metabolism Research Institute affiliated with TUMS for critically reviewing and approving the research project. We thank Dr Neda Mehrdad for kindly supporting the research project approval process.

We would like to thank Dr Hamidreza Poorhosseini, Head of Tehran Heart Center (THC), Dr Saeed Sadeghian, Dr Seyed Hesameddin Abbasi, and the Cardiovascular Research Center of Tehran University Heart Center for approving the study protocol so that it could be conducted at the THC. We thank Dr Homeira Khodam and Dr Mahnaz Modanloo, assistant professors at Golestan University of Medical Sciences (Gorgan, Iran), for critically appraising the study design and their assistance on validating the study instruments. Moreover, we thank Mrs Fatemeh Ghavighalb, head nurse of the heart failure clinic in the THC, Mrs Mahsa Tavakoli, the secretary of the heart failure clinic in the THC, and Dr Emadoddin Hoseinjani, cardiology resident at TUMS, for their assistance with this project. We also thank the Tarahionline company for designing the self-care educational booklet and attractive colored diaries for weight and shortness of breath self-monitoring.

NDRC and the Research and Technology Deputy of Nursing and Midwifery School affiliated with TUMS financially supported this research project.

Conflicts of Interest

None declared.

Authors' Contributions

MN is the principal investigator of this trial. MN, RM, AAK, GR, SG, and MZ initiated the study design. RM is the responsible physician at the Tehran Heart Center. MZ is the executive manager of the project. MN, RM, and KA helped with implementation and data collection. MN, RM, MZ, and KA prepared the informed consent and data collection forms and the educational booklet. MN and KA prepared the data for statistical analysis. AAK and GR provided statistical expertise in clinical trial design and performed the statistical analysis. All authors contributed to the refinement of the study protocol and are accountable for all aspects of the work.

  1. Yancy C, Jessup M, Bozkurt B, Butler J, Casey DJ, Drazner M, et al. 2013 ACCF/AHA guideline for the management of heart failure: executive summary: a report of the American College of Cardiology Foundation/American Heart Association Task Force on practice guidelines. Circulation 2013 Oct 15;128(16):1810-1852. [CrossRef] [Medline]
  2. Ziaeian B, Fonarow GC. Epidemiology and aetiology of heart failure. Nat Rev Cardiol 2016 Dec;13(6):368-378 [FREE Full text] [CrossRef] [Medline]
  3. Callender T, Woodward M, Roth G, Farzadfar F, Lemarie J, Gicquel S, et al. Heart failure care in low- and middle-income countries: a systematic review and meta-analysis. PLoS Med 2014 Aug;11(8):e1001699 [FREE Full text] [CrossRef] [Medline]
  4. Shimokawa H, Miura M, Nochioka K, Sakata Y. Heart failure as a general pandemic in Asia. Eur J Heart Fail 2015 Sep;17(9):884-892 [FREE Full text] [CrossRef] [Medline]
  5. Ahmadi A, Etemad K, Khaledifar A. Risk factors for heart failure in a cohort of patients with newly diagnosed myocardial infarction: a matched, case-control study in Iran. Epidemiol Health 2016;38:e2016019 [FREE Full text] [CrossRef] [Medline]
  6. Zannad F, Garcia A, Anker S, Armstrong P, Calvo G, Cleland J, et al. Clinical outcome endpoints in heart failure trials: a European Society of Cardiology Heart Failure Association consensus document. Eur J Heart Fail 2013 Oct;15(10):1082-1094 [FREE Full text] [CrossRef] [Medline]
  7. Bhatia RS, Tu JV, Lee DS, Austin PC, Fang J, Haouzi A, et al. Outcome of heart failure with preserved ejection fraction in a population-based study. N Engl J Med 2006 Jul 20;355(3):260-269. [CrossRef] [Medline]
  8. Pazos-López P, Peteiro-Vázquez J, Carcía-Campos A, García-Bueno L, de Torres J, Castro-Beiras A. The causes, consequences, and treatment of left or right heart failure. Vasc Health Risk Manag 2011;7:237-254 [FREE Full text] [CrossRef] [Medline]
  9. Roger VL. Epidemiology of heart failure. Circ Res 2013 Aug 30;113(6):646-659 [FREE Full text] [CrossRef] [Medline]
  10. Bui A, Horwich T, Fonarow GC. Epidemiology and risk profile of heart failure. Nat Rev Cardiol 2011 Jan;8(1):30-41 [FREE Full text] [CrossRef] [Medline]
  11. Jaarsma T, Strömberg A, Ben GT, Cameron J, Driscoll A, Duengen H, et al. Comparison of self-care behaviors of heart failure patients in 15 countries worldwide. Patient Educ Couns 2013 Jul;92(1):114-120. [CrossRef] [Medline]
  12. Iqbal J, Francis L, Reid J, Murray S, Denvir M. Quality of life in patients with chronic heart failure and their carers: a 3-year follow-up study assessing hospitalization and mortality. Eur J Heart Fail 2010 Sep;12(9):1002-1008 [FREE Full text] [CrossRef] [Medline]
  13. Chioncel O, Lainscak M, Seferovic P, Anker S, Crespo-Leiro MG, Harjola V, et al. Epidemiology and one-year outcomes in patients with chronic heart failure and preserved, mid-range and reduced ejection fraction: an analysis of the ESC Heart Failure Long-Term Registry. Eur J Heart Fail 2017 Dec;19(12):1574-1585. [CrossRef] [Medline]
  14. Rajadurai J, Tse HF, Wang CH, Yang NI, Zhou J, Sim D. Understanding the Epidemiology of Heart Failure to Improve Management Practices: An Asia-Pacific Perspective. J Card Fail 2017 Apr;23(4):327-339 [FREE Full text] [CrossRef] [Medline]
  15. Siabani S, Driscoll T, Davidson PM, Najafi F, Jenkins MC, Leeder SR. Self-care and Its Predictors in Patients With Chronic Heart Failure in Western Iran. J Cardiovasc Nurs 2016;31(1):22-30. [CrossRef] [Medline]
  16. Zamanzadeh V, Valizadeh L, Jamshidi F, Namdar H, Maleki A. Self-Care Behaviors among Patients with Heart Failure in Iran. J Caring Sci 2012 Dec;1(4):209-214 [FREE Full text] [CrossRef] [Medline]
  17. Rahnavard Z, Nodeh ZH, Hatamipour K. Congestive heart failure: Predictors of health-related quality of life in Iranian women. Contemp Nurse 2014;47(1-2):159-167. [CrossRef] [Medline]
  18. Riegel B, Lee CS, Dickson VV, Medscape. Self care in patients with chronic heart failure. Nat Rev Cardiol 2011 Jul 19;8(11):644-654. [CrossRef] [Medline]
  19. Moser DK, Mann DL. Improving outcomes in heart failure: It's not unusual beyond usual care. Circulation 2002 Jun 18;105(24):2810-2812. [Medline]
  20. Siabani S, Leeder S, Davidson PM. Barriers and facilitators to self-care in chronic heart failure: a meta-synthesis of qualitative studies. Springerplus 2013;2(1):320 [FREE Full text] [CrossRef] [Medline]
  21. DeWalt D, Malone R, Bryant M, Kosnar M, Corr K, Rothman R, et al. A heart failure self-management program for patients of all literacy levels: a randomized, controlled trial [ISRCTN11535170]. BMC Health Serv Res 2006 Mar 13;6(1):30 [FREE Full text] [CrossRef] [Medline]
  22. Jurgens CY, Lee CS, Reitano JM, Riegel B. Heart failure symptom monitoring and response training. Heart Lung 2013;42(4):273-280. [CrossRef] [Medline]
  23. Wakefield B, Groves P, Drwal K, Scherubel M, Kaboli P. Evaluation of Feasibility of 2 Novel Heart Failure Monitoring Instruments to Facilitate Patient Recognition of Symptoms. J Cardiovasc Nurs 2016;31(1):42-52. [CrossRef] [Medline]
  24. Chaudhry SI, Wang Y, Concato J, Gill TM, Krumholz HM. Patterns of weight change preceding hospitalization for heart failure. Circulation 2007 Oct 02;116(14):1549-1554 [FREE Full text] [CrossRef] [Medline]
  25. Gwaltney C. Hearing the voice of the heart failure patient: key experiences identified in qualitative interviews. Br J Cardiol 2012;19(1):25. [CrossRef]
  26. McMurray J, Adamopoulos S, Anker S, Auricchio A, Böhm M, Dickstein K, Task Force for the DiagnosisTreatment of AcuteChronic Heart Failure 2012 of the European Society of Cardiology, ESC Committee for Practice Guidelines. ESC guidelines for the diagnosis and treatment of acute and chronic heart failure 2012: The Task Force for the Diagnosis and Treatment of Acute and Chronic Heart Failure 2012 of the European Society of Cardiology. Developed in collaboration with the Heart Failure Association (HFA) of the ESC. Eur J Heart Fail 2012 Aug;14(8):803-869 [FREE Full text] [CrossRef] [Medline]
  27. van der Wal HL, Jaarsma T, Moser DK, Veeger NJGM, van Gilst WH, van Veldhuisen DJ. Compliance in heart failure patients: the importance of knowledge and beliefs. Eur Heart J 2006 Feb;27(4):434-440. [CrossRef] [Medline]
  28. White M, Howie-Esquivel J, Caldwell MA. Improving heart failure symptom recognition: a diary analysis. J Cardiovasc Nurs 2010;25(1):7-12. [CrossRef] [Medline]
  29. Eastwood CA, Travis L, Morgenstern TT, Donaho EK. Weight and symptom diary for self-monitoring in heart failure clinic patients. J Cardiovasc Nurs 2007;22(5):382-389. [CrossRef] [Medline]
  30. Jones C, Holmes G, DeWalt D, Erman B, Wu J, Cene C, et al. Self-reported recall and daily diary-recorded measures of weight monitoring adherence: associations with heart failure-related hospitalization. BMC Cardiovasc Disord 2014 Jan 31;14(1):12 [FREE Full text] [CrossRef] [Medline]
  31. Smerecnik CMR, Mesters I, Kessels LTE, Ruiter RAC, De Vries NK, De Vries H. Understanding the positive effects of graphical risk information on comprehension: measuring attention directed to written, tabular, and graphical risk information. Risk Anal 2010 Sep;30(9):1387-1398. [CrossRef] [Medline]
  32. Croucher S, Williamson GR. Risk assessment in mental health: introducing a traffic light system in a community mental health team. Open Nurs J 2013;7:82-88 [FREE Full text] [CrossRef] [Medline]
  33. Ashir M, Marlowe K. Traffic Lights. Clinical Governance: An Intl J 2009 Aug 07;14(3):226-235. [CrossRef]
  34. Chan AW, Tetzlaff JM, Gøtzsche PC, Altman DG, Mann H, Berlin JA, et al. SPIRIT 2013 explanation and elaboration: guidance for protocols of clinical trials. BMJ 2013 Jan 08;346:e7586 [FREE Full text] [Medline]
  35. Poorhosseini H, Hesameddin Abbasi S. The Tehran Heart Center. European Heart Journal 2018 Aug 03;39(29):2695-2696. [CrossRef]
  36. Mann D, Zipes D, Libby P. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. Washington, DC: Elsevier; 2014:a.
  37. Black J, Romano P, Sadeghi B, Auerbach A, Ganiats T, Greenfield S, BEAT-HF Research Group. A remote monitoring and telephone nurse coaching intervention to reduce readmissions among patients with heart failure: study protocol for the Better Effectiveness After Transition - Heart Failure (BEAT-HF) randomized controlled trial. Trials 2014 Apr 13;15(1):124 [FREE Full text] [CrossRef] [Medline]
  38. Heart Foundation. 2015. Living well with chronic heart failure   URL: [accessed 2016-09-30] [WebCite Cache]
  39. Goodyear-Smith F, Arroll B, Chan L, Jackson R, Wells S, Kenealy T. Patients prefer pictures to numbers to express cardiovascular benefit from treatment. Ann Fam Med 2008;6(3):213-217 [FREE Full text] [CrossRef] [Medline]
  40. Gaissmaier W, Wegwarth O, Skopec D, Müller A, Broschinski S, Politi MC. Numbers can be worth a thousand pictures: individual differences in understanding graphical and numerical representations of health-related information. Health Psychol 2012 May;31(3):286-296. [CrossRef] [Medline]
  41. Garcia-Retamero R, Dhami MK. Pictures speak louder than numbers: on communicating medical risks to immigrants with limited non-native language proficiency. Health Expect 2011 Mar;14 Suppl 1:46-57 [FREE Full text] [CrossRef] [Medline]
  42. American Heart Association. 2015. Self-check Plan for Heart Failure Management   URL: https:/​/www.​​-/​media/​files/​health-topics/​heart-failure/​self-check-plan-for-hf-management-477328.​pdf?la=en&hash=875F6CDFB9A16372FA8CABC3552D14EABFEFABCA [accessed 2016-03-21]
  43. Green T. Heart failure self-monitoring toolkit. 2015.   URL: [accessed 2018-09-30] [WebCite Cache]
  44. White MF, Kirschner J, Hamilton MA. Self-care guide for the heart failure patient. Circulation 2014 Jan 21;129(3):e293-e294. [CrossRef] [Medline]
  45. Haefeli M, Elfering A. Pain assessment. Eur Spine J 2006 Jan;15 Suppl 1(Suppl 1):S17-S24 [FREE Full text] [CrossRef] [Medline]
  46. Moser DK, Dickson V, Jaarsma T, Lee C, Stromberg A, Riegel B. Role of self-care in the patient with heart failure. Curr Cardiol Rep 2012 Jun;14(3):265-275. [CrossRef] [Medline]
  47. Vellone E, Riegel B, Cocchieri A, Barbaranelli C, D'Agostino F, Antonetti G, et al. Psychometric testing of the Self-Care of Heart Failure Index Version 6.2. Res Nurs Health 2013 Oct;36(5):500-511. [CrossRef] [Medline]
  48. Siabani S, Leeder SR, Davidson PM, Najafi F, Hamzeh B, Solimani A, et al. Translation and validation of the Self-care of Heart Failure Index into Persian. J Cardiovasc Nurs 2014;29(6):E1-E5. [CrossRef] [Medline]
  49. Riegel B, Lee C, Dickson V, Carlson B. An update on the self-care of heart failure index. J Cardiovasc Nurs 2009;24(6):485-497 [FREE Full text] [CrossRef] [Medline]
  50. van der Wal MH, Jaarsma T, Moser DK, van Veldhuisen DJ. Development and testing of the Dutch Heart Failure Knowledge Scale. Eur J Cardiovasc Nurs 2005 Dec;4(4):273-277. [CrossRef] [Medline]
  51. Eskandari S, Heravi KM, Rejeh N, Ebadi A, Montazeri A. Translation and Validation Study of the Iranian Version of Minnesota Living with Heart Failure Questionnaire. Payesh J 2015;14(4):475-484.
  52. Middel B, Bouma J, de Jongste M, van Sonderen E, Niemeijer MG, Crijns H, et al. Psychometric properties of the Minnesota Living with Heart Failure Questionnaire (MLHF-Q). Clin Rehabil 2001 Oct;15(5):489-500. [CrossRef] [Medline]
  53. Carvalho V, Guimarāes G, Carrara D, Bacal F, Bocchi EA. Validaçāo da versāo em português do Minnesota Living with Heart Failure Questionnaire. Arq. Bras. Cardiol 2009 Jul;93(1):39-44. [CrossRef]
  54. Garin O, Soriano N, Ribera A, Ferrer M, Pont A, Alonso J, Grupo IC-QoL. [Validation of the Spanish version of the Minnesota Living with Heart Failure Questionnaire]. Rev Esp Cardiol 2008 Mar;61(3):251-259 [FREE Full text] [Medline]
  55. Matsuoka S, Kato N, Kayane T, Yamada M, Koizumi M, Ikegame T, et al. Development and Validation of a Heart Failure-Specific Health Literacy Scale. J Cardiovasc Nurs 2016;31(2):131-139. [CrossRef] [Medline]
  56. Make B. How can we assess outcomes of clinical trials: the MCID approach. COPD 2007 Sep;4(3):191-194. [CrossRef] [Medline]
  57. 2017.   URL:
  58. Chen SY, Feng Z, Yi X. A general introduction to adjustment for multiple comparisons. J Thorac Dis 2017 Jun;9(6):1725-1729 [FREE Full text] [CrossRef] [Medline]
  59. World Medical Association. 2008. Ethical principles for medical research involving human subjects   URL: https:/​/www.​​policies-post/​wma-declaration-of-helsinki-ethical-principles-for-medical-research-involving-human-subjects/​ [accessed 2018-09-30] [WebCite Cache]
  60. Rogers A, Addington-Hall J, McCoy A, Edmonds P, Abery A, Coats A, et al. A qualitative study of chronic heart failure patients' understanding of their symptoms and drug therapy. Eur J Heart Fail 2002 Jun;4(3):283-287 [FREE Full text] [Medline]
  61. Grange J. The role of nurses in the management of heart failure. Heart 2005 May;91 Suppl 2(suppl 2):ii39-42; discussion ii43 [FREE Full text] [CrossRef] [Medline]

DHFKS: Dutch Heart Failure Knowledge Scale
HF: heart failure
HFpEF: heart failure preserved ejection fraction
HFQOL: heart failure quality of life
HFrEF: heart failure reduced ejection fraction
IRB: institutional review board
LMIC: low- and middle-income country
LVEF: left ventricle ejection fraction
MCID: minimal clinically important difference
MLHFQ: Minnesota Living with Heart Failure Questionnaire
NYHA: New York Heart Association
QOL: quality of life
REC: research ethical committee
SCHFI: Self-Care Heart Failure Index
SOB: shortness of breath
SPIRIT: Standard Protocol Items: Recommendations for Interventional Trials
THC: Tehran Heart Center
TLS: traffic light system
TUMS: Tehran University of Medical Sciences

Edited by G Eysenbach; submitted 18.10.17; peer-reviewed by P Athilingam, K Antypas; comments to author 14.12.17; revised version received 15.12.17; accepted 02.01.18; published 14.11.18


©Mahin Nomali, Ramin Mohammadrezaei, Abbas Ali Keshtkar, Gholamreza Roshandel, Shahrzad Ghiyasvandian, Kian Alipasandi, Masoumeh Zakerimoghadam. Originally published in JMIR Research Protocols (, 14.11.2018.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on, as well as this copyright and license information must be included.