Detection of Renal Artery Stenosis
Prospective Comparison of Captopril-Enhanced Doppler Sonography, Captopril-Enhanced Scintigraphy, and MR Angiography
Salah D. Qanadli1,
Gilles Soulez1,
Eric Therasse2,
Viviane Nicolet1,
Sophie Turpin3,
Daniel Froment4,
Maryse Courteau4,
Marie-Claude Guertin5 and
Vincent L. Oliva1
1
Department of Radiology, CHUM, Hôpital
Notre-Dame, 1560 Sherbrooke St. E., Montréal,
Quebec H2L 4M1, Canada.
2
Department of Radiology, CHUM, Hôpital
Hotel-Dieu de Montréal, University of
Montréal, 3840 St. Urbain, H2W 1T8
Montréal, Quebec, Canada.
3
Department of Nuclear Medicine, CHUM, Hôpital
Hotel-Dieu de Montréal, University of
Montréal, H2W 1T8
Montréal, Quebec, Canada.
4
Department of Medicine, CHUM, Hôpital
Notre-Dame, Montréal, Quebec H2L 4M1,
Canada.
5
Department of Biostatistics, Hotel-Dieu de
Montréal, University of
Montréal,
Montréal, Quebec H2L 4M1, Canada.
View larger version (167K):
[in a new window]
|
Fig. 1A. —76-year-old man with severe hypertension. Radiologic
investigation revealed discrepancy between MR angiography and catheter
angiography. Catheter angiogram reveals bilateral renal artery stenosis. Right
renal artery stenosis (arrow) was considered meaningful using 50%
threshold and insignificant using 70% threshold (measurement of investigator
1: 54%; investigator 2: 64%). Similarly, left renal artery stenosis
(arrowhead) was meaningful for 50% threshold and insignificant for
70% threshold (investigator 1: 58%; investigator 2: 54%).
|
|
View larger version (126K):
[in a new window]
|
Fig. 1B. —76-year-old man with severe hypertension. Radiologic
investigation revealed discrepancy between MR angiography and catheter
angiography. Maximum-intensity-projection reconstruction obtained from
gadolinium-enhanced MR angiography shows bilateral renal artery stenoses.
However, degree of stenosis was overestimated as compared with catheter
angiography. Right renal artery stenosis (long arrow) was considered
meaningful using 70% threshold by second investigator (investigator 1, 63%;
investigator 2: 71%) and left renal artery stenosis (short arrow) was
considered meaningful using 70% threshold by first investigator (investigator
1: 75%; investigator 2: 61%), thus resulting in false-positive results for
gadolinium-enhanced MR angiography.
|
|
View larger version (66K):
[in a new window]
|
Fig. 1C. —76-year-old man with severe hypertension. Radiologic
investigation revealed discrepancy between MR angiography and catheter
angiography. Intrarenal Doppler waveform obtained from right kidney 1 hr after
captopril administration. Systolic rise is perfectly straight
(arrow), indicating a normal finding. Left renal Doppler study had
equally normal findings.
|
|
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati What's this?
Copyright © 2001 by the American Roentgen Ray Society.
