Off - pump coronary artery bypass with multiple arterial conduits

Objective: to analyze intra-hospital results in patients undergoing elective off-pump total arterial revascularization and identify morbidity and mortality predictors using this surgical strategy. Methods: From May 1999 to February 2004, 203 myocardial revascularization procedures with total arterial revascularization without cardiopulmonary bypass (off-pump) were carried out in patients with multivessel disease (three vessels 81.7 %, one vessel disease was excluded). We report pre-surgical variables and co-morbidities: average age 63.9 ± 9.13 years, men 182 (89.5%), hypertension 132 (65%), smokers 125 (61%), hypercholesterolemia 152 (74.8%), previous myocardial infarction (> 30 days) 73 (35%), moderate to severe ventricular dysfunction 31 (15%), redo 5 (2.5%). Total arterial revascularization included T-grafts and sequential grafts with left internal mammary (100%), right internal mammary (56.6%) and radial (63%) arteries. The total number of distal anastomosis was 576 (mean of 3 grafts/patient), all carried out with external mechanical stabilizers. There were no proximal aortic anastomoses. Conversion to on-pump surgery occurred in 3 patients (1.5%). 90% of the patients was extubated in the operating room. The multiple logistic regression test was used for statistical analysis. Results: The postoperative incidence of atrial fibrillation was 12.8% (26), oligoanuric renal failure 3% (6), dialysis 0.49% (1), postoperative myocardial infarction 1.47% (3), low cardiac output 4% (8), Redo for bleeding 1.47% (3), mediastinitis 1.47% (3), stroke 1.47% (3). Intra-hospital mortality was 2.45% (5). The only independent 30 day morbidity predictor was age (p=0.033; OR 1.04; IC 95%: 11.08). Conclusion: Off-pump myocardial revascularization with arterial conduits for multiple vessel disease is feasible with a low 30-day morbidity and mortality. Descriptors: Coronary surgery. Off-pump circulation. Multiple vessel disease. Arterial conduits Cirurgia coronária com condutos arteriais múltiplos sem circulação extracorpórea Off-pump coronary artery bypass with multiple arterial conduits