Editorial comment.

摘要

The authors propose the division of a small number of patients with ED with or without Peyronie disease into fast or slow responders based on time to maximum peak systolic velocity (PSV) obtained on a color duplex Doppler study. The slow responders had a higher eventual PSV and had a higher number of PSVs of 30 cm/s or higher. However, usefulness of this division for ramifications for classifying ED characteristics of the 2 groups was not present. Certainly, the value of this well-written study is the lesson for necessity to follow-up patients beyond 10 minutes for obtaining maximum systolic velocity. The authors when queried about the differences between those who peaked at 20 and 25 minutes stated that the only characteristic was the higher percentage of patients with PSV > 30 cm/s who peaked at 25 minutes (61% vs 53%). Another limitation of this study besides the small numbers is the use of a low dose of a single vasoactive agent, which differs from the way this study was performed at other centers. The utility of this division remains to be defined for diagnostic or therapeutic value for patients with ED. Whether such a division will be duplicated for multiagent and multidosing of course requires further study.