Why does heart disease cause impotence?

Erectile dysfunction and heart disease

Erectile dysfunction was previously considered a psychological problem, which is still a valid cause in some men. However, many studies have linked erectile dysfunction with heart disease. For the majority of men over 40, erectile dysfunction is caused by cardiovascular disease. Erectile dysfunction may be a sign of vascular problems and atherosclerosis. Many men with ED also have or will likely develop blocked coronary arteries in the future.

Scientists have concluded that ED and cardiovascular problems share the same underlying problems of damage to blood vessels. Erectile dysfunction is now considered a problem of the blood vessel lining (endothelium) in the penis. In ED, the blood vessels are not able to relax and cannot accommodate an increase of blood flow to the penis. In the heart, a coronary artery that is stiff and atherosclerotic can lead to a heart attack. The underlying cardiovascular problem for both conditions is the same. 

Hypertension and erectile dysfunction

Because so many men with ED also have cardiovascular disease, a physical checkup should also be performed for hypertension or heart disease. Blood pressure, fasting blood glucose levels, cholesterol, and body mass index should be collected. Men with ED and vascular disease need to be physically examined to evaluate whether ED medication or if sexual activity is a high risk.