Depression nearly triples the risk of death following a heart attack, even when accounting for other heart attack risk factors, according to research presented at the American College of Neuropsychopharmacology (ACNP) annual meeting, which showed that among 360 depressed, post myocardial infarction patients followed for more than six years, those who did not recover from their depression in the first six months were more than twice as likely to die.
This study was one of several presented at a panel which examined the links between depression and vascular disease. “There is an unequivocal link between depression and heart disease, but it is not clear what causes this link,” said Alexander Glassman, M.D., Professor of Psychiatry at Columbia University, College of Physicians and Surgeons and ACNP member. “There is a whole series of factors that link depression and heart disease and we are just beginning to understand how antidepressants act in people who have these conditions together.” Additional risk factors that tend to be major medical predictors of death from a heart attack include the severity of the heart attack and variability in various measures of heart function during recovery.
Depression has increasingly been recognized to increase the risk for cardiovascular disease. Possible reasons for this association include sticky platelets, a condition depressed patients are likely to have, or autonomic nervous activity, which increases heart irritability.
Ronald S. Duman, Ph.D., professor of psychiatry and pharmacology at Yale University School of Medicine and an ACNP member, also presented research on this topic. His work examined molecular mechanisms and the identity of the protein, vascular endothelial growth factor (VEGF). VEGF is a key growth factor in the formation of vascular cells and was originally identified and studied for its role in the formation of vascular tissues.