Figure 2.

A graphic depiction of the artery size hypothesis in a patient with acute myocardial infarction. In most of patients, acute myocardial infarction (AMI) is due to abrupt coronary occlusion superimposing on isolated, nonsignificant coronary lesion. In other terms, AMI occurs in a modestly involved coronary tree. Penile circulation might be supposed to be similarly mild involved, accounting for low erectile dysfunction prevalence. CAD: coronary artery disease; CVD: cardiovascular disease; ED: erectile dysfunction.