Abstract
Aim.This study was conducted to investigate the level of nurses’ knowledge, attitude and practice about self-care education in people with heart failure.
Background.Heart failure is one of the most common chronic diseases and the leading cause of death in the world and also, a major cause of hospital readmission, especiallyin elderly patients. Self-care education is an essential componentof care for people with heart failure. Nurses are the first providers ofself-careeducation for patients and must have a thorough knowledge, a positive attitude and skillfull practice in the field of self-care education.
Method. In this descriptive-analytical study, 174 nurses with at least one year working experience in the CCU, post CCU and medical wards of ShahidRajaie Cardiovascular and Research Center, completed a four-part questionnaire including demographics information, and knowledge, attitude and practice about self-care education in people with heart failure. Data were analyzed using descriptive and inferential statistics in SPSS, version 22.
Findings. The majority of nurses (70.1 percent)  had an average knowledge score. The knowledge level of nurses were significantly related with level of education and working experience. Also, 67.8 percent of the participants had a good practice of self-care education about heart failure and their practice was significantly related with experiencing in-service education. More than 90 percent of nurses reported positive attitude towards self-care education about heart failure and their attitude was significantly related with level of education, in-service education and work schedule.
Conclusion. The knowledge of nurses was at average level. It is recommended to plan in-service education in order to promote nurses’ level of knowledge about self-care education about heart failure.

Abstract
Aim. This study was carried out to compare the effect of trinitroglycerin (TNG) spray and sublingual pearl on chest pain severity and some physiological indices of people with chest pain visited by emergency medical services.
Background. Glyceryl trinitrate is used as an anti-anginal vasodilating agent with various forms including spray and pearl with probable different therapeutic effects.
Method. In this quasi-experimental study, 80 patients with chest pain were recruited through convenience sampling and then allocated to pearl and spray groups by minimization method. After arriving at the patient's bedside, vital signs and chest pain severity were measured and recorded, then the drug was administered every 5 minutes for 3 times; thereafter, the measurements were repeated. The data analyzed in SPSS software 1) using descriptive and inferential statistics.
Findings. The results showed that after intervention, the mean score of pain in pearl and spray groups were 6.05±0.98 and 5.60±1.25, respectively. There was no statistically significant difference between groups in terms of pain score. Whereas after intervention, the mean systolic and diastolic pressure in pearl group was significantly lower than the spray group, the heart rate in both groups were increased.  
Conclusion. Nitroglycerin in the pearl form has the same effect as spray form in relieving chest pain. According to the circumstances and drug accessibility, emergency staff might use every two forms of Nitroglycerin.

Abstract
Aim. The aim of the study was to examine the effect of lifestyle education using a mobile phone application on adherence to the treatment regimen in patients with hypertension.
Background. High blood pressure is the most important risk factor for cardiovascular diseases and mortality. Educational applications have provided an effective method for self-care and blood pressure control of patients.
Method. This research is a clinical trial study. The number of samples in control and experimental group was 60 people. In the experimental group, the training was conducted using the mobile application at least three times a week for two months and was followed up during the course through phone calls and virtual networks. In the control group, the usual training of the health center was provided. The degree of adherence to the treatment plan of the patients was measured by a researcher-made questionnaire, before and two weeks after the end of the intervention. Data analysis was done in SPSS version 21 using t-test, multivariate covariance analysis and post-hoc test.
Findings. Comparing the adherence to the treatment program between the two groups after the educational intervention, the mean and standard deviation of the scores of the control and experimental group was 337±22 and 441±20, respectively. There was a statistically significant difference between groups after the intervention in all variables including blood pressure, diet, physical activity, drug regimen, and other domains of compliance with the treatment program (p≤0.0001), which indicated the effectiveness of lifestyle training using a mobile phone application on blood pressure and adherence to the treatment plan.
Conclusion. The use of mobile phone application can be effective and useful for improving and controlling blood pressure among patients with hypertension. Nurses, as one of the most important members of the health care team, can have a direct impact on patients’ quality of life through educational interventions