Erectile Dysfunction [Disease/Finding] Impotence, Vasculogenic [Disease/Finding] M0028121 D018783 Impotence, Vasculogenic 986774 C0243000 Impotence, Vasculogenic N0000003855 Inability to achieve and maintain an erection (ERECTILE DYSFUNCTION) due to defects in the arterial blood flow to the PENIS, defect in venous occlusive function allowing blood drainage (leakage) from the erectile tissue (corpus cavernosum penis), or both. C7888