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Quantification of collateral flow in humans: a comparison of angiographic, electrocardiographic and hemodynamic variables

^a Department of Cardiology, Academic Medical Center, Amsterdam, the Netherlands

View larger version (28K): [in a new window]   Figure 1 Receiver operating characteristic curves for the presence of ischemia of the hemodynamic variables measured. dMPVcol = diastolic collateral maximal peak velocity; dVicol = diastolic collateral blood flow velocity integral; Pw = mean coronary wedge pressure; Pw/Pao = coronary wedge/aortic pressure ratio; Rcoll = collateral resistance; Rrec = peripheral resistance of the recipient coronary artery; sVicol = systolic collateral blood flow velocity integral; Vicol = total collateral blood flow velocity integral.

View larger version (22K): [in a new window]   Figure 2 Relationship between the mean coronary wedge pressure/mean aortic pressure ratio (Pw/Pao) and the total collateral blood flow velocity integral (Vicol) in patients split by the presence of ischemia and angiographical grading of collateral vessels (group 1–3).