Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.
Doppler for vascular causes of ED. Injection of vasoactive drugs like papaverin and prostaglandin E into corpora cavernosa → increase in arterial flow into bilateral cavernosal arteries > 35 cm/s is nl. If arterial inflow is nl and RI stays below 0.8 (no stenosis) but unable to maintain erection --> venous outflow mechanism leak should be suspected
AVF (high flow priapism) or thrombosis of the dorsal penile vein (venous outflow mechanism obstruction, low-flow priapism)
Fibrosis of the tunica albuginea of the corpora cavernosa --> penis bend toward the plaque during erection --> pain. Localized area of thickening of the tunica albuginea sometimes w/ calcs, along the dorsum of the penis base