title: Morphofunctional evaluation of the heart of obese patients before and after bariatric surgery.
abstract: BACKGROUND
  This study aims to evaluate the effect of weight loss on the physical capacity and the structure and function of the heart after bariatric surgery.
  
  
  METHODS
  Forty-three adult obese patients, 31 women (72.1%) and 12 men (27.9%), were submitted to electrocardiogram, ergometric test, and echo Doppler cardiogram at presurgical stage and 1 year after Roux-en-Y gastric bypass. The statistical analysis utilized the Wilcoxon, Student's t, and Shapiro-Wilk tests with 5% significance level.
  
  
  RESULTS
  Weight was reduced from 116.5 ± 21.5 to 80 ± 15.9 kg and body mass index from 41.8 ± 4.4 to 28.4 ± 3.8 kg/m(2). Cardiac frequency was reduced from 77.9 ± 9.6 to 70.9 ± 7.8 bpm, systolic pressure from 130 ± 20 to 120 ± 10 mmHg, and diastolic pressure from 80 ± 10 to 80 ± 0 mmHg. Ergometric tests showed distance covered from 378.9 ± 126.5 to 595 ± 140.4 m, metabolic coefficient from 6.7 ± 2.4 to 8.3 ± 2.6 ml O(2)/kg/min, and oxygen consumption (VO(2)) from 23.1 ± 8.4 to 30 ± 10.3 metabolic equivalents of task. The echo Doppler cardiogram showed interventricular septum from 12 ± 2 to 10 ± 1 mm, posterior wall from 11 ± 2 to 10 ± 1 mm, and ventricular mass from 273 ± 85 to 216 ± 60 g. There was improvement in the diastolic function with an increase in the E'/A' and E/A relationship and the ejection fraction with an increase from 70.2 ± 7.2% to 72.9 ± 6.4%.
  
  
  CONCLUSIONS
  Bariatric surgery improved physical capacity as well as structural and functional improvement of the heart.
authors.affiliation: Department of Surgery, State University of Londrina, 777 Santos Street, Londrina, PR, 86020-041, Brazil. valezi@sercomtel.com.br
authors.forename: Antonio Carlos
authors.initials: AC
authors.lastname: Valezi
authors.forename: Vitor Hugo Soares
authors.initials: VH
authors.lastname: Machado
mesh_terms: D000328:Adult; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D015390:Gastric Bypass; D006801:Humans; D008297:Male; D009765:Obesity / Q000503:physiopathology* / Q000601:surgery*; D011182:Postoperative Care; D011300:Preoperative Care; D011446:Prospective Studies; D015431:Weight Loss