title: Impact of body mass index in the results after primary angioplasty in patients with ST segment elevation acute myocardial infarction.
abstract: BACKGROUND
  Obese patients submitted to elective coronary angioplasty have a paradoxical reduction in hospital and long-term mortality. In primary angioplasty setting, the relation with Body Mass Index (BMI) is less studied.
  
  
  OBJECTIVE
  To evaluate the impact of obesity in the results after ST-segment elevation acute myocardial infarction treated by primary angioplasty.
  
  
  METHODS
  Study of 539 consecutive patients with ST-segment elevation acute myocardial infarction (STEMI) submitted to primary angioplasty. We evaluated in-hospital, 30-day and one-year all-cause mortality according to BMI: 'normal', <25 kg/m(2); 'overweight', 25-29.9 kg/m(2) and 'obese', ≥ 30 kg/m(2).
  
  
  RESULTS
  Obese patients were younger, had more hypertension and hyperlipidemia. There were no differences in previous cardiac history and hospital data. In-hospital mortality was 8.0% for patients with normal BMI, 4.4% for overweight patients and 5.9% for obese patients (P=0.296). At 30 days, 9.6%, 5.2% and 6.9% (P=0.212) and at first year, 11.2%, 5.2% and 6.9% (P=0.064), respectively. Overweight was the only group with decreased risk (OR: 0.44, 95% CI: 0.21-0.90, P=0.015), even after adjustment for confounding variables (OR: 0.37, 95% CI: 0.15-0.95, P=0.038).
  
  
  CONCLUSIONS
  Overweight patients had a better prognosis after primary angioplasty for STEMI compared with other BMI groups.
authors: Cardiology Department, Santa Marta Hospital, Centro Hospitalar de Lisboa Central EPE, Portugal. ana_timoteo@yahoo.com
authors: Ana Teresa
authors: AT
authors: Timóteo
authors: Ruben
authors: R
authors: Ramos
authors: Alexandra
authors: A
authors: Toste
authors: José Alberto
authors: JA
authors: Oliveira
authors: Maria Lurdes
authors: ML
authors: Ferreira
authors: Rui Cruz
authors: RC
authors: Ferreira
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D015992:Body Mass Index; D005260:Female; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000401:mortality / Q000628:therapy*; D009765:Obesity; D011174:Portugal; D016019:Survival Analysis; D016896:Treatment Outcome