Outcomes of Coronary Artery Bypass Grafting With Bilateral Internal Mammary Artery in Obese Patients

BackgroundThe purpose of this study was to evaluate postoperative outcomes with the use bilateral internal mammary artery (BIMA) conduits in obese patients.MethodsBetween January 2003 and December 2018, 8109 patients underwent isolated coronary bypass grafting, including 7218 (89%) treated single (SIMA) 891 (11%) BIMA grafts. Patients were divided into 3 groups according preoperative body mass index (BMI): normal, BMI <25 kg/m2 (22.2%); overweight, 25 <30 (37.2%); obese, ≥30 (40.6%). In each group, SIMA compared investigate 30-day mortality complications. Significant baseline differences observed between groups, such adjusted by inverse probability weighting matching.ResultsThirty-day mortality, deep sternal wound infection (DSWI) rates, length hospital stay 1.4%, 0.5%, 6.0 ± 9.1 days for normal group; 0.2%, 1.0%, 5.5 4.2 overweight 0.9%, 1.8%, 4.0 group. There no significant difference incidence DSWI, except which rate DSWI significantly higher (3.4% vs 0%; P = .02).ConclusionsBIMA grafts can be used without an increase stay. However, may lead DSWI.