“…Thus the results of both cavernometry and cavernography will suggest an abnormality of the veins, when the problem may in fact rest with the arteries. This has been highlighted by DePalma et al (1989), who found false positive results in tests of venous leak in men with arteriopathy. False positive results have also been reported in psychogenic impotence (Desai and Gingell, 1988) as well as in 12% of normally potent controls (Newman and Reiss, 1984).…”