Abstract: Objective To evaluate the clinical efficacy of sequential bilateral internal mammary artery grafting combined with selective coronary venous bypass graft (CVBG) during offpump coronary artery bypass surgery.
Methods We retrospectively analyzed the clinical data of 38 patients with diffuse right coronary arteriostenosis undergoing operation in Anzhen Hospital of Capital Medical University from March 2004 to August 2010. Based on the operation method, the patients were divided into two groups. In the CVBG group, there were 17 patients including 11 males and 6 females with an average age of 46.1±6.2 years who underwent off-pump sequential bilateral internal mammary artery grafting combined with CVBG. In the control group, there were 21 patients including 14 males and 7 females with an average age of 45.9±5.7 years, and they underwent the off-pump sequential bilateral internal mammary artery grafting without CVBG. Blood flow of bridged vessels was measured. The perioperative parameters including number of grafts, tracheal intubation time, hospitalization time, complications, results of echocardiography, myocardial nuclide imaging and coronary angiography were compared between the two groups of patients. Results There was no hospital mortality or complications such as cerebral events, sternal and mediastinal infections. There was statistical difference in graft number between CVBG group and control group (3.3±1.1 vessels vs. 2.2±1.6 vessels, P lt;0.05). There were no statistical differences in internal mammary artery trunk blood flow (81.5±32.7 ml/min vs. 76.8±28.4 ml/min), left internal mammary artery trunk blood flow (32.5±18.8 ml/min vs. 28.1±167 ml/min) and right internal mammary artery trunk blood flow (39.6 ±19.0 ml/min vs. 35.9±18.3 ml/min) between CVBG and control group (P gt;0.05). Followup was done for all the 38 patients with a follow-up rate of 100%. Follow-up time was 3.55 months (37.4±9.8 months). No angina symptoms occurred in CVBG group and myocardial blood supply of inferior wall in this groups improved obviously based on the results of electrocardiogram, while there were 8 cases of angina in the control group with inferior wall myocardial ischemia and ST-T changes according to the results of electrocardiogram (P lt;0.05). Heart functions were significantly improved in both groups three months after surgery. Through myocardial nuclide imaging, we found that myocardial blood supply of inferior wall was obviously improved in CVBG group. Coronary angiography in CVBG group showed that there was blood flow to myocardium in the arterialized vein. Conclusion Sequential bilateral internal mammary artery grafting combined with selective arterialization of the coronary venous system can be performed during offpump coronary artery bypass surgery. Cardiac functions and quality of life are improved after the surgery. This provides a new surgical method for diffuse right coronary lesions.
Citation： YU Yang,GU Chengxiong,LI Haitao.. Analysis on the Clinical Efficacy of Offpump Sequential Bilateral Internal Mammary Artery Grafting Combined with Selective Arterialization of the Coronary Venous System. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2011, 18(5): 394-398. doi: Copy
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