Myocardial Contrast Echocardiography Assessment of Acute Changes in Collateral Perfusion of Contralateral Coronary Artery with Coronary Flow Reserve After Coronary Angioplasty

The CFVR of an artery that supplies extensive collaterals is limited because of an elevation in the baseline resting flow velocity. This restriction in CFVR improves proportionally with decreases in PA that occurs after angioplasty of the ipsilateral coronary artery. These data suggest that PA, in addition to coronary artery structure, influences CFVR.