title: [Surgical treatment of aortic valve disease with stentless bovine pericardium prosthesis: immediate results].
abstract: OBJECTIVE
  To present the immediate results and assess the clinical and hemodynamic performance of stentless bovine pericardial bioprostheses in aortic position.
  
  
  METHODS
  Twenty patients were operated who were indicated for surgery for valve replacement with biological prosthesis. Eleven patients were male; sixteen had aortic stenosis; four, insufficiency; the mean age was 66.3 +/- 8.8 years. The surgical technique used was subcoronary implant. Associated procedures were performed in five patients. Postoperative morbidity, mortality and hemodynamic performance were assessed on transthoracic echocardiogram.
  
  
  RESULTS
  Mean time of cardiopulmonary bypass was 136.5 +/- 24.41 minutes and mean anoxic time was 105.2 +/- 21.62 minutes. Hospital mortality was 5% (one patient). Mean time of intensive care unit stay was 3.65 +/- 3.23 days. Mean postoperatively transvalvular gradient was was 25.39 +/- 7.82 mmHg. Left ventricle ejection fraction was 67 +/- 13.49% preoperatively and 63.24 +/- 16.06% postoperatively (p = 0.45). Eleven patients did not present any degree of valve regurgitation, eight presented mild regurgitation and one ,mild to moderate regurgitation.
  
  
  CONCLUSIONS
  Stentless prostheses can be used for the surgical treatment of aortic valve diseases, with in hospital mortality and morbidity similar to the mortality and morbidity described in the literature for similar procedures, with satisfactory hemodynamic performance.
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP. araujowesley@uol.com.br
authors.forename: Wesley Ferreira
authors.initials: WF
authors.lastname: de Araújo
authors.forename: Luis Roberto
authors.initials: LR
authors.lastname: Gerola
authors.forename: Hyoung C
authors.initials: HC
authors.lastname: Kin
authors.forename: Armindo
authors.initials: A
authors.lastname: Pereira Filho
authors.forename: Guilherme Flora
authors.initials: GF
authors.lastname: Vargas
authors.forename: Roberto
authors.initials: R
authors.lastname: Catani
authors.forename: Enio
authors.initials: E
authors.lastname: Buffolo
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001021:Aortic Valve / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000601:surgery*; D001705:Bioprosthesis; D001938:Brazil / Q000453:epidemiology; D002417:Cattle; D005112:Extracorporeal Circulation; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation / Q000379:methods / Q000401:mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011300:Preoperative Care; D015607:Stents; D016896:Treatment Outcome