Non-invasive assessment of left internal mammary-coronary bypass patency using the external Doppler probe.
Non-directional blood velocity of left internal mammary bypass grafts was non-invasively studied with the Doppler ultrasonic probe. Thirteen of 14 subjects had angiographic evidence of bypass graft patency and their Doppler signals demonstrated high amplitude phasic blood velocities. A single patient with proximal left internal mammary arterial graft occlusion manifested marked attenuation of Doppler blood velocity signals. It is concluded that this technic offers a potential for ambulatory and in-office screening of internal mammary artery bypass graft function.
D001783:Blood Flow Velocity; D006328:Cardiac Catheterization; D002339:Carotid Arteries; D003326:Coronary Circulation; D004562:Electrocardiography; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D009204:Myocardial Revascularization / Q000009:adverse effects; D010701:Phonocardiography; D011674:Pulse; D012212:Rheology