[Videodensitometric and electromagnetic flow measurements in aorto coronary bypass grafts (author's transl)].
Electromagnetic flow measurements in aorto coronary bypass grafts and cine angiography were performed simultaneously during bypass surgery. Using the front velocities of injected boli of contrast medium the videodensitometric measurement (QVD) overestimates the electromagnetically measured flow (QEM) systematically about 20% (QVD = 1.26 . QEM = 4 ml/min; Syx = 10.8 ml/min; r = 0.97). During the passage of the front of the contrast medium through the videodensitometric measuring windows, the flow is altered by the injection about + 13.6 ml/min on an average.
D001783:Blood Flow Velocity; D002932:Cineangiography; D003287:Contrast Media / Q000008:administration & dosage*; D001026:Coronary Artery Bypass; D004562:Electrocardiography; D007275:Injections, Intravenous; D007432:Intraoperative Period
D003287:Contrast Media
Vergleich videodensitometrischer und elektromagnetischer Flussmessungen in aortokoronaren Bypassgefässen.