Abstract
Aim. The aim of this study was to analyze the concept of heart risk perception from healthcare staff perspective using hybrid method of concept analysis.
Background. In the discussion of behavior, awareness of risk factors for cardiovascular disease is very important in helping individuals to make informed decisions about continuing certain behaviors that increase the risk of the disease, but what matters more is the perception of a person at risk of a disease that affects his or her health functions.
Method. Hybrid model of concept analysis was used to clarify the meaning of perception of risk of heart disease. Three phases of a hybrid concept analysis include theoretical, fieldwork, and final analysis. In theoretical phase, different databases including PubMed, CINAHL, Science Direct, Google Scholar, SID and Magiran were searched for related articles published from 1990 to 2018). The search keywords were perception of risk; heart disease in titles and abstracts of the papers. In the fieldwork phase, semi-structured in -depth interviews were conducted with 18 nurses who were selected by purposive sampling. In next step, by combining the two previous stages the final analysis was performed.
Findings. The combination of theoretical and fieldwork findings resulted in definition of heart risk perception from healthcare staff perspective: “Understanding the risk of heart disease is a form of acquiring awareness of the risk of heart disease that is influenced by beliefs, values, culture and attitudes of individuals, and it stimulates learning and changing self-care behaviors for efficacy in promoting heart health and avoiding risk factors.”
Conclusion. The results of this study will help to clarify the concept of perception of risk of heart disease among healthcare system staff. This clarification may lead to offering comprehensive view and better understanding for use in the research and practice.

Abstract
Aim. The purpose of this study was to explore and clarify the concept of adherence to treatment in people with heart failure.
Background. The concept of adherence to treatment, which determines the consequences of heart failure, is widely used in the literature. But this concept is very complex and needs a clear definition.
Method. In this study, the evolutionary approach of Rogers concept analysis was used. The main criteria for entry were texts published in English between 2004 and 2019. The data sources were the PubMed, Scopus, and EMBASE. A total of 73 articles were found out of which 37 articles were selected after omitting duplications, and after screening the studies based on Prism Diagram, 35 articles were studied.
Findings. After reviewing the studies, 5 words, adherence to medication, medication adherence, non-medication adherence or self-care recommendations, adherence to therapeutic guidelines, and non- adherence treatment were recognized as alternative terms, and two concepts, compliance and self-care were identified as the most important and the most common concepts related to adherence to treatment. Seven concepts were found as the features of the adherence to treatment (adaptability, being multidimensional and complex, participatory, dependent on demographic variables and underlying diseases, being conscious and dependent on education, measurable and predictive, and continuous and follow-up). Outcomes of the concept of adherence to treatment were directly related to the consequences of the concept.
Conclusion. Adherence to treatment is a complex, multidimensional, participatory, conscious, and measurable concept that depends on demographic variables that must be constantly monitored by the health care team. Adherence to treatment is evolving over time, both semantically and conceptually.