M. Stuhrmann et al., DETECTION OF RENAL-ARTERY STENOSIS - POTE NTIALS AND LIMITS OF DOPPLER WAVE-FORM ANALYSIS IN INTRARENAL VESSELS IN COMPARISON WITH ANGIOGRAPHY, RoFo. Fortschritte auf dem Gebiete der Rontgenstrahlen und der neuenbildgebenden Verfahren, 168(3), 1998, pp. 258-263
Citations number
17
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging
Journal title
RoFo. Fortschritte auf dem Gebiete der Rontgenstrahlen und der neuenbildgebenden Verfahren
Purpose: The aim of this prospective study was to evaluate the potenti
als and limits of Doppler waveform analysis of intrarenal vessels in p
atients with suspected renal artery stenosis. Material and methods: In
a three-year study we compared our colour Doppler results of 111 pati
ents with the angiography results. Evaluated parameters were accelerat
ion time (AT), acceleration index (Al) and early systolic peak (ESP).
Results: The sensitivity of severe stenoses (greater than or equal to
70%) was 89%. In moderate stenoses (50-70%) it was possible to increas
e the sensitivity from 56% to 76% if a comparison with the contralater
al side was included. The specificity was 91%. Causes for limited sens
itivity and specificity were poore examination conditions, stenoses of
accessory renal arteries and moderate stenoses as well as diffuse non
-stenosing lesions. Conclusion: In comparison with angiography, the di
agnostic value of Doppler waveform analysis in the detection of renal
artery stenoses has specific limitations. In significant stenoses, how
ever, additional valuable haemodynamic information, useful for PTA, ca
n be obtained by this easy and accessible method.