The Depression, Heart Disease Link
WASHINGTON -- Severe depression may silently break a seemingly healthy woman's heart.
Doctors have long known that depression is common after a heart attack or stroke and worsens those people's outcomes. Last week , Columbia University researchers reported new evidence that depression can lead to heart disease in the first place.
The scientists tracked 63,000 women from the long-running Nurses' Health Study between 1992 and 2004. None had signs of heart disease when the study began, but nearly 8 percent had evidence of serious depression.
The depressed women were more than twice as likely to experience sudden cardiac death - death typically caused by an irregular heartbeat, concluded the 12-year study, published Monday in the Journal of the American College of Cardiology. They also had a smaller increased risk of death from other forms of heart disease.
The big surprise: Sudden cardiac death seemed more closely linked with antidepressant use than with the depression symptoms the women reported.
That might simply mean that women who used antidepressants were, appropriately, the most seriously depressed, cautioned lead researcher Dr. William Whang. But he said the finding merited more research.
Studies of the newer antidepressants most often used today so far haven't signaled a risk of irregular heartbeat, and some even have suggested protection, noted Dr. Redford Williams of Duke University, a specialist in how psycho-social factors affect health.
The drug question aside, Williams said the work adds to growing evidence that depression is an independent risk factor for heart disease - on top of the classic risks of high blood pressure, diabetes, high cholesterol and smoking.
Depression can make people do a worse job taking care of themselves. Indeed, the American Heart Association last year recommended that everyone who already has heart disease be regularly screened for depression - because depressed patients may skip their medications, sit indoors instead of exercising, and eat particularly poorly.