Magnetic Resonance Angiography and Doppler Scanning for Detecting Atherosclerotic Renal Artery Stenosis

Abstract

RDS might still be the diagnostic procedure of choice for screening outpatients for ARAS because it is inexpensive, convenient, able to detect severity, and avoids the use of contrast media. When RDS is negative in aged people who have smoked longer than 20 years, with coronary artery disease or serum creatinine > 4 mg/dL, MRA is recommended for further evaluation of ARAS.

Hypophosphatemic effect of niacin extended release in ischemic kidney disease

“…Diagnosis was confirmed through renal artery Doppler scan performed by skilled technician. The scan result was considered positive if there was turbulence before and after stenosis, maximum flow velocity > 180 cm/sec at stenosis, end-diastolic velocity > 50cm/sec, post-stenotic drop in velocity, acceleration time > 0.07 seconds and slope of systolic upstroke < 3 m/s 2 or resistance index associated with stenosis or occlusion of the segmental arteries < 0.5 (Ng et al, 2010[ 26 ]). Though, existence or absence of ischemic tissue damage was sole decision of associated nephrology consultant based on clinical picture and Doppler result.…”

Accuracy of Duplex Ultrasound for Detecting Renal Artery Stenosis: A Systematic Review

“…Twelve of 25 studies reported accuracy as a main outcome. 12,14,[24][25][26][27][28][29][30][31]32,33 Six of those 12 studies reported high agreement with CVA, 14,30,33 SRA, 25,29 and MRA 24 (range: 81-98%). The remaining 6 of 12 studies reported either moderate, 28 low, 31 or a combination of the degree of agreement depending on the DUS parameter.…”

“…12,14,[24][25][26][27][28][29][30][31]32,33 Six of those 12 studies reported high agreement with CVA, 14,30,33 SRA, 25,29 and MRA 24 (range: 81-98%). The remaining 6 of 12 studies reported either moderate, 28 low, 31 or a combination of the degree of agreement depending on the DUS parameter. 12,27,32 These studies were generally conducted using similar criterion measures (eg, MRA, SRA, and CVA).…”

“…12,27,32 These studies were generally conducted using similar criterion measures (eg, MRA, SRA, and CVA). Most studies reported sensitivity (n = 24/25) 3,5,12,14,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] and specificity (n = 24/25). 3,5,12,14,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]40,41,43,44 Nine of 24 studies reported exclusively high sensitivity (range: 90%-...…”

Simulation of phase contrast angiography for renal arterial models

“…the time between the onset of the cardiac wave and the systolic peak [ 6 ]—an important predictor of stenosis. This parameter can be conveniently estimated during the Doppler ultrasound (DUS) examination, which is however inferior to PCA in regard to its ability of reconstructing anatomical details of the arterial system [ 7 ]. The intravascular ultrasound can be employed to estimate the level of stenosis or guide the stent placement, but its clinical use is reported mainly in relation to coronary and carotid arteries [ 8 , 9 ].…”