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Coronary collaterals, stenoses, and stents

Is a new era of physiologic-guided percutaneous revascularization emerging?^*

^* Cardiovascular Division, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA

View larger version (20K): [in a new window]   Figure 1 Schematic diagram of measurement of Doppler-derived collateral flow index (Doppler-CFI) and pressure-derived collateral flow index (Pressure-CFI), also known as FFRcoll, during balloon inflation of the index lesion during percutaneous revascularization. Pa = mean aortic pressure; Pv = central venous pressure; Pw = coronary wedge pressure; Voccl = blood velocity distal to balloon occlusion; Vpatent = blood velocity in patent vessel after reactive coronary hyperemia has subsided. See text for details. Reprinted with permission from the American College of Cardiology Foundation Journal of the American College of Cardiology, 1998;32:1272–9.