Introduction and Objective:
Scientific evidence exists of the connection between depression and cardiovascular diseases. Depression can lead to the development of cardiovascular diseases, while cardiologic problems can induce depression-related disorders. The aim of study was to review the relevant literature concerning the relationship between the occurrence of coronary heart disease and depression.

Brief description of the state of knowledge:
The incidence of depression in patients with coronary heart disease (including those with a history of myocardial infarction) is around 15-20%. In some patients, depressive symptoms subside spontaneously within a few months. However, as shown by long-term studies, depression can persist up to two years after myocardial infarction. The occurrence of depression in patients with coronary heart disease is translated into worse treatment results. These patients are more likely to have recurrent coronary events and are at an increased risk of death due to cardiologic reasons. There are many theories regarding the relationship between depression and coronary heart disease. There is evidence that it is cardiovascular disease that causes depression. However, some researchers indicate that depression contributes to the development of coronary heart disease.

Conclusions:
Summing-up the review of the research, it should be noted that depression is a common problem among patients with coronary heart disease. On average, every third patient with coronary heart disease has depressive disorders. Therefore, the introduction of screening tests for depression should be considered in patients with cardiovascular diseases.