title: [Mid-long-term clinical results and hemodynamic evaluation of aortic valve replacement with 17 mm St. Jude medical regent valve].
abstract: OBJECTIVE
  To investigate the mid-long-term clinical results of aortic valve replacement with 17 mm St. Jude medical regent valve with hemodynamic evaluation including the measurement of effective orifice area, the occurrence of prosthesis-patient mismatch (PPM) and its affect on heart function.
  
  
  METHODS
  There were 44 patients accepted aortic valve replacement with 17 mm St. Jude medical regent valve because of small aortic annulus. Before the operation and during the postoperative follow-up, color doppler echocardiography was used to measure the hemodynamic parameters, such as left ventricular mass (LVmass), effective orifice area (EOA) and effective orifice area index (EOAI), etc.
  
  
  RESULTS
  Transthoracic echocardiographic data were obtained from 39 of 44 patients (88.6%) at 12-55 months after surgery. One (2.27%) died of heart failure in 1 year. According to the current standard of PPM (EOAI < or = 0.85 cm2/m2), 33 cases (82.1%) had PPM, 13 cases (30.8%) had severe PPM with an EOAI < or = 0.65 cm2/m2. After the operation, there were significant decreases in LVAo-PG (19 +/- 8) mmHg and left ventricular mass index (LVmass I) (86.6 +/- 23.3) g/m2 (P < 0.05). The assessment for physical capacity according to NYHA classification: 41 patients improved to class II or better and 2 patients improved to class III (P < 0.05).
  
  
  CONCLUSIONS
  The patients with small aortic annulus may obtain satisfactory clinical results after AVR with 17 mm St. Jude medical regent valve, PPM seems not affect the mid-long-term results.
authors.affiliation: Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.forename: Er-Yong
authors.initials: EY
authors.lastname: Zhang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Fang
authors.forename: Jun
authors.initials: J
authors.lastname: Gu
authors.forename: Hong
authors.initials: H
authors.lastname: Qian
mesh_terms: D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000601:surgery; D018618:Echocardiography, Doppler, Color; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000379:methods*; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D016276:Ventricular Function / Q000502:physiology