Low body mass index (< 18.5 kg/m2) was significantly associated with increased postoperative mortality (4.1% vs 1.8%) compared to normal weight patients undergoing off-pump coronary artery bypass grafting.
Cohort (n=1,100)
No
Does abnormal Body Mass Index increase postoperative complications and mortality in patients undergoing off-pump coronary artery bypass grafting?
In patients undergoing off-pump coronary artery bypass grafting, low BMI is a significant risk factor for postoperative mortality and prolonged intubation, while obesity is associated with respiratory complications like atelectasis and fever.
Absolute Event Rate: 4.1% vs 1.8%
p-value: p=0.037
BACKGROUND: Body Mass Index (BMI) is considered as an important risk factor in cardiovascular surgery. We designed a historical cohort study for the evaluation of perioperative complications related to BMI in patients who underwent off-pump coronary artery bypass grafting (OPCAB).METHODS: We studied 1120 consecutive patients who underwent OPCAB between January 2008 and December 2011 in Imam Ali Hospital, Kermanshah, Iran. Patients were divided into four groups according to BMI: underweight/low BMI ( 30 kg/m2). RESULTS: In multivariable regression analysis, an important correlation between the underweight/low BMI group and mortality was observed (p=0.037). Postoperative stroke, postoperative atrial fibrillation (AF) and intra-aortic balloon pump (IABP) use were not associated with BMI. In linear regression analysis, significant correlations between low BMI, reintubation, ICU stay time and intubation time were found. Re-exploration for bleeding was significantly correlated with having a low or high BMI. CONCLUSION: Having a low BMI (which is association with malnutrition and respiratory muscles weakness) was significantly associated with reintubation, prolonged intubation time and ICU stay time. The obese group was also associated with postoperative atelectasia and fever.KEYWORDS: Coronary Artery Bypass, Body Mass Index, Postoperative Complications
Sabzi et al. (Fri,) conducted a cohort in Coronary artery disease requiring CABG (n=1,100). Low Body Mass Index (< 18.5 kg/m2) vs. Normal weight BMI (18.5 to 24.9 kg/m2) was evaluated on Postoperative mortality (p=0.037). Low body mass index (< 18.5 kg/m2) was significantly associated with increased postoperative mortality (4.1% vs 1.8%) compared to normal weight patients undergoing off-pump coronary artery bypass grafting.
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