ISSN:
1432-1084
Keywords:
Key words: Hypertension
;
renal
;
Renal angiography
;
Renal arteries
;
stenosis or obstruction
;
Computed tomography (CT)
;
helical technology
;
Computed tomography (CT)
;
three-dimensional
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract. A prospective study was carried out to determine the accuracy of spiral CT angiography (CTA) in the detection of renal artery stenosis (RAS). Eighty-two patients with arterial hypertension underwent CTA and digital subtraction angiography (DSA) to exclude RAS. For CTA a contrast medium bolus of 100–150 ml (flow rate 3 ml/s) was injected. A 24 or 40 s CTA was started at the origin of the superior mesenteric artery after a delay time determined by test bolus injection (collimation = 2 mm, pitch = 1/1.5). For stenosis detection transverse images supported by maximum intensity projections (MIP) or multiplanar reconstruction projections were used. Of 197 renal arteries examined (including 33 accessory arteries), 34 RAS were visualized using DSA. With CTA, one hemodynamic RAS was missed and one additional hemodynamic RAS was found. Sensitivity/specificity was calculated to be 94 %/98 %. For hemodynamically relevant RAS (〉 50 %) the sensitivity/specificity was 96 %/99 %. CTA additionally depicted five adrenal masses. The high accuracy rate of RAS detection thus allows the use of CTA as a screening method in patients with arterial hypertension to exclude a renovascular cause.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003300050707
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