title: [Helical x-ray computed tomography of renal arteries. Apropos of 300 patients].
abstract: 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.
authors.affiliation: Service de Radiologie Vasculaire, Hôpital Cardiologique, CHRU de Lille.
authors.forename: J P
authors.initials: JP
authors.lastname: Beregi
authors.forename: S
authors.initials: S
authors.lastname: Louvegny
authors.forename: L
authors.initials: L
authors.lastname: Ceugnart
authors.forename: S
authors.initials: S
authors.lastname: Willoteaux
authors.forename: M
authors.initials: M
authors.lastname: Elkohen
authors.forename: F
authors.initials: F
authors.lastname: Desmoucelle
authors.forename: G
authors.initials: G
authors.lastname: Deklunder
authors.forename: L
authors.initials: L
authors.lastname: Wattinne
mesh_terms: 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
vernacular_title: Angioscanographie hélicoïdale des artères rénales. A propos de 300 patients.