Frequency of obesity and its risk of adverse outcomes associated with coronary artery bypass surgery

ABSTRACT

We aimed to investigate the prevalence of obesity in patients undergoing CABG, to assess in these patients the distribution of prognostic factors and the early outcomes after surgery. It was a perspective, observational and descriptive study, conducted at National Institute of Cardiovascular Diseases [NICVD] Karachi. All patients underwent first and elective CABG whether underwent on or off-pump were included. The prognostic variables noted were age, gender. coronary risk profile, h/o prior myocardial infarction or unstable angina, cerebrovascular accident. The degree of obesity was assessed by BMI derived from Quetelet's formula i.e. Underweight [<20 kg/m2] Normal [> 20 and <25 kg/m], Overweight [> 25 and < 30kg/m2], Obese [> 30 and < 35 kg/m2] and Severely obese > 35 kg/m2. RESULTS: Total of 115 patients underwent CABG during the study period. Patients were classified as underweight 6 [5%]; as normal weight 57 [50.9%]; as overweight 38 [33.9%]; as obsess 5 [4.2%]; and as severely obese 6[5%]. Total obese patients were 11 [10%]. The incidence was more in obese patients as regard to postoperative arrhythmias 5 [45%]; pulmonary complications 5 [45%]; hours ventilated > 10 5 [45%]; perioperative MI occurred only obese patients 1 [9%] as compared to non-obese. There was no incidence of CVA, surgical and renal complications in obese patients