Aspirin renography in the diagnosis of renovascular hypertension: a comparative study with captopril renography.

Abstract:

:Captopril renography is used for the non-invasive diagnosis of renovascular hypertension, but suffers from the drawbacks of lower sensitivity and false-positive tests due to a fall in blood pressure. Aspirin renography has been proposed as a useful test for evaluation of unilateral renal artery stenoses of moderate degree. We studied the clinical usefulness of aspirin renography in 12 patients with a clinical suspicion of renovascular hypertension and compared it with captopril renography using 99Tcm-DTPA. The test was considered positive if there were changes in the time-activity curve according to the criteria specified by the American Society of Hypertension Working Group. Four patients with discordant results between captopril and aspirin underwent intra-arterial digital subtraction angiography. In two patients, the renal arteries were normal; captopril was false-positive in both these patients. Bilateral stenosis was noted in the third patient, with captopril being false-negative on the right side with moderate stenosis, whereas aspirin was true-positive. There was unilateral stenosis in the fourth patient; captopril was false-positive on the contralateral side. Our results suggest that aspirin renography is superior to captopril renography in the assessment of patients with a suspicion of both unilateral and bilateral renovascular hypertension.

journal_name

Nucl Med Commun

authors

Maini A,Gambhir S,Singhal M,Kher V

doi

10.1097/00006231-200004000-00006

keywords:

subject

Has Abstract

pub_date

2000-04-01 00:00:00

pages

325-31

issue

4

eissn

0143-3636

issn

1473-5628

journal_volume

21

pub_type

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