Erectile dysfunction: Three links between erectile dysfunction and heart disease - Mayo Clinic:
"Erectile dysfunction can be a wake-up call that you are at risk for heart disease. The same factors that contribute to heart disease %u2014 smoking, cholesterol, diabetes, obesity, high blood pressure and others %u2014 can cause sexual problems.

Heart health and erectile function share several important connections. Understanding these connections may help you recognize the symptoms of cardiovascular disease sooner %u2014 and improve your chances of maintaining your sexual ability.

Atherosclerosis. This damaging process, which reduces blood flow to your heart and contributes to coronary artery disease, could also affect the blood vessels to the penis, keeping you from sustaining an erection. Conversely, if you're having trouble with erections, it could be a sign that your heart is also at risk.
Medications. Some prescriptions that men take to protect their hearts can cause erectile dysfunction. Additionally, medications that are often prescribed for erectile dysfunction may not be safe when combined with certain heart medications.
Anxiety and depression. Erectile dysfunction itself can be a significant source of anxiety for men. Add to that a fear that sexual activity could cause a heart attack, and your love life could take a plunge. Depression frequently affects men with heart disease. Both the condition itself and some of the medications used to treat it can lead to erectile dysfunction......[MORE]"