Earlier research has shown that depression is relatively common among people with heart disease. An article published in Mayo Clinic Women’s HealthSource (February 2006) noted that the two conditions are often linked. In the general population, depression affects roughly one person out of twenty. Among individuals with heart disease, however, the rate is closer to one in three.

Research has also suggested that depression may sometimes precede the development of heart disease. In one study involving postmenopausal women, those with depression were found to have a higher risk of death from heart disease compared with women without depression, with risk estimates approximately 50% higher.

Depression affects more than mood alone. It has been associated with physiological changes, including increases in blood pressure and stress hormone levels. These findings suggest that emotional health and cardiovascular health are closely connected, highlighting the importance of considering mental and physical factors together when examining heart disease risk.