title: Impact of body mass index on outcome in patients undergoing coronary artery bypass grafting and/or valve replacement surgery.
abstract: OBJECTIVE
  This study aimed to analyze the impact of body mass index on outcomes of 101 patients undergoing coronary artery bypass grafting, valve replacement, or combined valve/ coronary artery bypass grafting surgery in a private hospital in Belo Horizonte, Brazil.
  
  
  METHODS
  This was a prospective cross-sectional study of patients undergoing cardiac surgery from May 2009 to December 2012. All patients were followed up from the first day of admission until discharge or death. Patients were divided into three groups according to BMI: normal weight, overweight, and obese. The main outcome measure was the association between BMI and postoperative morbidities and mortality.
  
  
  RESULTS
  Multivariate analysis identified obesity as an independent predictor of increased risk of surgical reintervention (odds ratio [OR] 13.6; 95%CI 1.1 - 162.9; P=0.046) and reduced risk of bleeding (OR 0.05; 95% CI 0.09 - 0.69; P=0.025). Univariate analysis showed that obesity was associated with increased frequency of wound dehiscence (P=0.021). There was no association between BMI and other complications or mortality in univariate analysis. There was also no association between body mass index and duration of cardiopulmonary bypass, aortic clamping, mechanical ventilation, and intensive care unit or hospital stay.
  
  
  CONCLUSIONS
  Obese individuals undergoing coronary artery bypass grafting, valve replacement, or combined surgery have a higher postoperative risk of surgical reintervention and lower chances of bleeding.
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Vinícius Eduardo Araújo
authors: VE
authors: Costa
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Silvia Marinho
authors: SM
authors: Ferolla
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Tâmara Oliveira dos
authors: TO
authors: Reis
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Renato Rocha
authors: RR
authors: Rabello
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Eduardo Augusto Victor
authors: EA
authors: Rocha
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Célia Maria Ferreira
authors: CM
authors: Couto
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: José Carlos Ferreira
authors: JC
authors: Couto
authors: Hospital Vera Cruz, Belo Horizonte, MG, BR.
authors: Alduir
authors: A
authors: Bento
mesh_terms: D000368:Aged; D015992:Body Mass Index; D001938:Brazil; D001026:Coronary Artery Bypass / Q000379:methods / Q000401:mortality*; D004812:Epidemiologic Methods; D005260:Female; D019918:Heart Valve Prosthesis Implantation / Q000379:methods / Q000401:mortality*; D006801:Humans; D007362:Intensive Care Units; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications*; D011183:Postoperative Complications / Q000209:etiology* / Q000401:mortality; D012016:Reference Values; D012307:Risk Factors; D016896:Treatment Outcome