title: A positive pharmacological erection test does not rule out arteriogenic erectile dysfunction.
abstract: OBJECTIVE
  We tested the assumption that a positive pharmacological erection test implies normal penile vascular status.
  
  
  METHODS
  From March 1991 to February 1995, 372 patients with erectile dysfunction were referred to our institutions. Penile hemodynamics were studied in 205 patients with color coded Doppler ultrasonography after intracavernous injection of 40 micrograms. prostaglandin E1.
  
  
  RESULTS
  Of the 205 patients undergoing color coded Doppler utrasonography 92 had a rigid erection, that is a positive pharmacological erection test. Doppler wave analysis showed that 76 of the 92 patients (82%) had normal and 7 (8%) had borderline arterial function (peak systolic velocity greater than 35 and 25 to 35 cm. per second, respectively), while 9 (10%) had arterial insufficiency (peak systolic velocity less than 25 cm. per second). All 92 patients had a normal veno-occlusive mechanism (resistance index greater than 0.90). Of the 9 patients with pure arteriogenic erectile dysfunction 8 had risk factors for arterial insufficiency, such as aortoiliac occlusive disease (5), diabetes mellitus (3), longer than 20-year smoking history (8) and hypertension (7).
  
  
  CONCLUSIONS
  Our study shows hemodynamically that a positive pharmacological erection test does not rule out arteriogenic erectile dysfunction.
authors.affiliation: Department of Urology R, School of Medicine, University of Bari, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Cormio
authors.forename: H
authors.initials: H
authors.lastname: Nisén
authors.forename: F P
authors.initials: FP
authors.lastname: Selvaggi
authors.forename: M
authors.initials: M
authors.lastname: Ruutu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000527:Alprostadil / Q000494:pharmacology*; D006801:Humans; D018783:Impotence, Vasculogenic / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D010410:Penile Erection / Q000187:drug effects*; D018615:Ultrasonography, Doppler, Color; D014665:Vasodilator Agents / Q000494:pharmacology*
chemical_list: D014665:Vasodilator Agents; D000527:Alprostadil