Evidence of aortoiliac stenosis involving the most symptomatic limb was established by noninvasive vascular testing (ankle-brachial index [ABI] 0.9, thighbrachial
index 1.1, common femoral artery systolic accelerationtime 140 milliseconds,n=41); duplex ultrasound (doubling of peak systolic velocity in the aortoiliac segment combined with an
ABI 0.9; n=26); computed tomographic angiography (n=28) or magnetic resonance angiography (n=5) confirming at least 60%