*ED can result from impairment of any of the complex mechanisms that underlie penile erection. Hormonal imbalance (e.g., hypogonadism), neurological disease, pelvic surgery (e.g., radical prostatectomy), and atherosclerosis of the cavernous arteries can lead to ED. Vasculogenic ED is the most frequent subtype found in 70% of all cases,4 and it can represent an early manifestation of generalized vascular disease.
