The treatment of heart failure is one of the main pillars of the management of patients with chronic heart failure and adherence to treatment is a real problem in managing these patients. Several personal, social and environmental factors can participate in this component, which is why it is worthwhile to look into the question.

The aim of our work was to study the adherence of patients to different treatments for heart failure and to study the main influencing factors.

We carried out a cross-sectional study related to a survey at the heart failure unit in the cardiology department of the IBN ROCHD CHU Casablanca, conducted on 180 patients regularly followed in the service over a period of 6 months from January to June 2018, the data were collected by a survey: CARDIA, and analyzed by SPSS software.

The mean age of our patients was 60.6 years, with male predominance (62 vs 38%), the main cause of heart failure was ischemic and the ejection fraction was between 35 and 40% in 40%. Adherence to treatment was optimal in 59% of patients. Patient's knowledge of the importance of each drug was only present in 40%. In non-adherent patients, the main etiology was low socio-economic status (22%) followed by age and non-support (15%).

Poor adherence to treatment is a real public health problem in Morocco hence the interest to create support units and explanation to patients with heart failure.