• Calin Vicol, Georg Nollert, Helmut Mair, Vicky Samuel, Che Lim, Michael Tiftikidis, Sandra Eifert, and Bruno Reichart.
• Department of Cardiac Surgery of the Ludwig-Maximilian University Munich, Grosshadern Medical Center, Munich, Germany. cvicol@belios.med.uni-muenchen.de
• Heart Surg Forum. 2003 Jan 1; 6 (5): 341-4.

BackgroundOff-pump cardiac surgery is becoming an established method of surgical revascularization. However, performing anastomoses on a beating heart can be challenging, especially through small incisions. We compared our midterm results in patients with 1 vessel disease using full sternotomy (OPCAB) or a left anterior minithoracotomy (MIDCAB).MethodsAt our institution between December 1996 and December 1998, 102 patients (OPCAB, n = 45, MIDCAB, n = 57); age, 61 +/- 11 years; 69% men with 1-vessel disease of the left anterior descending coronary artery (LAD) underwent off-pump myocardial revascularization through the left internal thoracic artery (LITA). In the OPCAB group 17 (37.8%) of the patients received an additional vein graft to a diagonal branch. OPCAB was generally preferred in obese or high-risk patients or patients with a long LITA-LAD distance (>7 cm) on an electron beam computed tomography of the chest.ResultsOperative mortality was 0. Time of surgery (169 +/- 48 versus 197 +/- 45 minutes) and coronary artery occlusion time (19 +/- 7 versus 23 +/- 6 minutes) were significantly lower (P = .004 and P = .009) in the OPCAB group. MIDCAB surgery was related to a higher incidence of occluded (4 versus 0; P = .039) or stenosed (7 versus 2; P = .06) anastomoses and necessity for immediate reintervention (9 versus 0; P = .023). During a mean follow-up period of 5.2 years, MIDCAB patients (6 MIDCAB patients versus 1 OPCAB patient) tended to need more coronary interventions and develop more recurrent angina (23 MIDCAB versus 12 OPCAB patients). Two OPCAB patients died during the follow-up period.ConclusionsOur initial experience in beating heart surgery demonstrated that MIDCAB is technically more challenging than OPCAB. MIDCAB procedures should therefore be performed by experienced surgeons on selected patients. Midterm results after OPCAB procedures tend to a lower rate of adverse cardiac events.

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