This prospective study involved 27 patients who underwent dynamic infusion cavernosometry/cavernosography and color duplex Doppler ultrasound. Phase III dynamic infusion cavernosometry/cavernosography determination of cavernous artery systolic occlusion pressure and color duplex Doppler measurements of peak velocity flow were performed. Four subpopulations were defined: 1) normal cavernous artery systolic occlusion pressure and peak velocity flow, 2) abnormal systolic occlusion pressure and normal peak velocity flow, 3) normal systolic occlusion pressure and abnormal peak velocity flow, and 4) abnormal systolic occlusion pressure and peak velocity flow. Peak velocity flow significantly correlated with cavernous artery systolic occlusion pressure and, using a normal value of greater than 25 cm. per second, resulted in a sensitivity and specificity of 95%. The positive predictive value of an abnormal peak velocity flow was calculated to be 95%. We conclude that peak velocity flow is an effective, reliable and noninvasive means of evaluating corporeal arterial function in an office setting.