Abstract:

Objective   To observe the bloodstream change of patients’ left internal mammary artery (LIMA) during absolute arterial off-pump coronary artery bypass grafting (CABG) with “Y”-type anastomosis of LIMA and radial artery. Methods   From October, 2008 to August, 2010, 42 patients underwent absolute arterial off-pump CABG with “Y”-type anastomosis of LIMA and radial artery were included in this study. LIMA’s blood flow was measured with Medi-stim Butterfly Flowmeter when LIMA was in situ, when LIMA was anastomosed sequentially, and when radial artery was anastomosed sequentially. SPSS13. 0 statistic software was used for analysis. Results   The blood flow of LIMA after sequential anastomosis was not significantly different from that of in situ.The blood flow of LIMA after sequential anastomosis of radial artery was significantly different from that of in situ and after sequential anastomosis of LIMA. The TTFM oscillogram of all LIMA mainly showed in the blood wave of diastole period.After operation, CK-MB of 3 patients was higher in 24 hours, and was reduced to normal level in 48 hours. Ventricular premature beat happened in 2 patients, and ventricular fibrillation happened in 1 patient. No perioperative myocardial infarction or low cardiac output syndrome occurred. And all the patients got rid of angina after operation. Conclusion   The blood flow of LIMA, which has a considerable flow reserve, has a certain relationship with its blood-supply area. And CABG with “Y”-type anastomosis of LIMA and radial artery can revascularize the heart.

Key words: CABG; Off-pump;Internal mammary artery; Radial artery