title: Contrasting acute effects of captopril and nifedipine on renal function in renovascular hypertension.
abstract: In order to assess the determinants of renal function deterioration induced by angiotensin-converting enzyme inhibition (ACEI) in renovascular hypertension, studies were performed in patients with bilateral stenosis (BS; n = 12) and stenosis of a solitary kidney (SK; n = 10). Acute administration of captopril was associated with a consistent fall in glomerular filtration rate in 5 of 12 patients with BS and 8 of 10 with SK. Overall, glomerular filtration rate decreased by 22 +/- 7%, while mean arterial pressure decreased by only 8 +/- 2% and renal plasma flow remained unaltered. The ACEI-induced change in glomerular filtration rate was unrelated to blood pressure or basal plasma renin activity, but it was inversely related to pre-ACEI filtration fraction. In a comparative study conducted in 6 BS and 4 SK patients, acute administration of nifedipine was associated with a change in glomerular filtration rate of 13 +/- 5% and no change in renal plasma flow, despite a marked decrease in mean arterial pressure of 19 +/- 4%. In contrast, in the same patients, glomerular filtration rate fell by 23 +/- 12%, renal plasma flow did not change and mean arterial pressure fell slightly by 7 +/- 3% after ACEI.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Medicine, Hôpital Lapeyronie, Montpelier, France.
authors.forename: J
authors.initials: J
authors.lastname: Ribstein
authors.forename: G
authors.initials: G
authors.lastname: Mourad
authors.forename: A
authors.initials: A
authors.lastname: Mimran
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000187:drug effects; D002216:Captopril / Q000008:administration & dosage*; D005260:Female; D005919:Glomerular Filtration Rate; D006801:Humans; D006978:Hypertension, Renovascular / Q000503:physiopathology*; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000008:administration & dosage*; D012078:Renal Artery Obstruction / Q000503:physiopathology; D012079:Renal Circulation
chemical_list: D002216:Captopril; D009543:Nifedipine