The diagnosis of renovascular hypertension: the role of captopril renal scintigraphy and related issues

Use of Doppler Ultrasonography to Predict the Outcome of Therapy for Renal-Artery Stenosis

“…4,5,[21][22][23][24][25] However, this approach is less accurate in patients with renal impairment, patients with bilateral renal-artery stenosis, and patients with unilateral renal-artery stenosis. 4 Furthermore, the value of captopril scintigraphy as a means of identifying patients in whom renal function is likely to improve after the correction of renal-artery stenosis has not been assessed prospectively.…”

Renal Imaging

“…The recommendations are summarised in Table 5.2. 99m Tc-MAG 3 is preferred in cases of reduced renal function (Prigent 1993). ACEI and diuretic treatment should ideally be stopped before scanning.…”

Diagnostic imaging of renal artery stenosis

“…There is no consensus on the most effective protocol for the use of renal scintigraphy to detect RAS. 36,37 Prior to the examination patients are usually fasted but allowed free fluids to maintain good hydration. Both baseline and/or ACE inhibition scintigraphy can be performed.…”

“…Reported figures range from 34% to 100% for sensitivity and 72% to 95% for specificity. 37,38,41 Some authors rely on post ACE inhibition renograms only 40 and others feel that overall diagnostic accuracy has not been improved since the addition of ACE inhibitors. 39 The usefulness of renal scintigraphy as a diagnostic test for renal artery stenosis has recently been questioned.…”