[Helical x-ray computed tomography of renal arteries. Apropos of 300 patients].
OBJECTIVE
To evaluate the role of helical CT angiography (CTA) in the detection of renal artery stenosis in hypertensive patients.


METHODS
We studied 300 hypertensive patients (50 prospectively and 250 consecutively) with CTA and arteriography (n = 118). Helical acquisition (collimation 3 mm; pitch = 1, 20 seconds acquisition time) was performed 20-45 seconds after contrast injection (300 mgl/ml; 120 ml, 4 ml/sec). Transverse axial views and 3D reconstructions were analyzed (360 degrees interpolation algorithm, 1 mm overlapped).


RESULTS
In the prospective series, CTA sensitivity was 100% for main renal artery stenoses and specificity was 98.2%; however 7/32 renal accessory arteries were not visualized. In the 300 patients studied, seventy-four stenoses were detected. There were 5 false-positive and 5 false-negative studies. Secondary hypertension was detected in 26% of patients (including 14 cases of adrenal hyperplasia).


CONCLUSIONS
CTA is a promising technique for the detection of renal artery stenosis in hypertensive patients.
Beregi
J P
JP
Service de Radiologie Vasculaire, Hôpital Cardiologique, CHRU de Lille.
Louvegny
S
S
Ceugnart
L
L
Willoteaux
S
S
Elkohen
M
M
Desmoucelle
F
F
Deklunder
G
G
Wattinne
L
L
D000328:Adult; D000368:Aged; D000792:Angiography; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D006973:Hypertension / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012077:Renal Artery / Q000000981:diagnostic imaging*; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed
Angioscanographie hélicoïdale des artères rénales. A propos de 300 patients.