In patients with coronary arteries that are deeply buried in the myocardium and fat, it is difficult and sometimes risky to expose them for off-pump coronary artery bypass grafting (OPCAB), leading to unavoidable conversion to conventional coronary artery bypass grafting (C-CABG) to ensure their safety. We have developed a new search procedure for these coronary arteries using a dedicated ultrasonic flowmeter with a small tip probe for OPCAB. This technique enables the identification of intramuscular and intra-fat coronary arteries that are less diseased and thus more suited for bypass surgery instead of switching to C-CABG. We believe this procedure will not only improve the quality of OPCAB but also expand its indication.
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