Quadruple, Quintuple and Sextuple Bypass with Exclusive Use of In Situ Arterial Conduits in Coronary Artery Bypass Grafting / 日本心臓血管外科学会雑誌

ABSTRACT

Although sequential bypass with <i>in situ</i> arterial conduits (the left and right internal thoracic arteries; LITA and RITA, the right gastroepiploic artery; GEA) in coronary artery bypass grafting (CABG) is technically demanding, it is one of the most important procedures using a limited number of <i>in situ</i> arterial conduits to revascularize a wide area. In this report, we retrospectively investigated the clinical outcome of CABG with 4 or more distal anastomoses using only <i>in situ</i> arterial conduits. From December 1990 to May 1999, 62 patients underwent CABG with <i>in situ</i> arterial conduits, with at least one sequential bypass. There were 59 men and 3 women patients with mean age of 59.6 years (41 to 82 years). Mean postoperative follow-up period was 32 months (1 to 101 months). The total number of distal anastomoses was 4 (1 sequential bypass) in 54 patients, 4 (2 sequential bypasses) in 6 patients, 5 (1 sequential bypass) in 1 patient and 6 (3 sequential bypasses) in 1 patient. There were 5 emergency operations (8%), 37 patients (60%) had a history of myocardial infarction, 30 patients (48%) had diabetes mellitus and 6 patients (10%) had chronic renal failure and were on hemodialysis. Left ventricular ejection fraction was 40% or less in 15 patients (24%). There were no early deaths. Angiographic patency was satisfactory for each graft (sequential individual, LITA 96.7% 100%, RITA 100% 100%, GEA 89.5% 97.4%). Patency of a distal anastomoses of GEA was rather poorer than that of proximal (<i>p</i>=0.03). Three patients died during the follow-up period (all of them due to malignancy). The 5-year actuarial survival and cardiac event-free rate was 94.6% and 87.2%, respectively. In conclusion, although an indication of GEA sequential grafting needs further study, <i>in situ</i> arterial grafting with at least one sequential arterial conduit was associated with excellent results and achieved more complete revascularization with exclusive use of <i>in situ</i> arterial conduits in patients with diffuse coronary artery disease.