@Article{Perek2007,
journal="Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery",
issn="1731-5530",
volume="4",
number="2",
year="2007",
title="Kardiochirurgia dorosłychAortic valve replacement with On-X 21 mechanical prosthesis in patients with small aortic root \– 5 years\’ experience",
abstract="Aim: Evaluation of early and mid-term outcome after aortic valve replacement with On-X 21 mechanical prostheses in patients with small aortic root.  Material and methods: This study involved 50 patients (pts) (33 men and 17 women) at the mean age of 61.6\±7.6 years who underwent aortic valve replacement with On-X 21 prostheses between 2001 and 2004. All pts were operated on through a median sternotomy using cardiopulmonary bypass in moderate hypothermia (26-28°C). At the end of follow-up echocardiography was performed and prostheses\’ performance was assessed (mean transvalvular gradient (PPG), effective orifice area (EOA) and its index (EOAi)). Results: Perioperative mortality was 2.0% (1 pt). During follow-up (mean duration time 41.7\±9.6 months) completed by 47 pts (94.0%) the other three pts died. 12- and 48-month probability of survival was 94.0\±3.4% and 91.8\±4.0%, respectively. Nobody required reoperation; no cases of prosthetic valve infective endocarditis or perivalvular leakage were noted either. Estimated 12- and 48-month freedom from thromboembolic complications was 97.9\±2.1% and 89.7\±0.8%, and freedom from anticoagulant-induced haemorrhagic accidents was 97.9\±2.1% and 95.5\±3.1%, respectively. In the last follow-up outpatient clinic examination, 39 pts (90.7%) were in I or II NYHA functional classes. Implanted prostheses functioned properly with mean PPG 10.7\±3.6 mmHg, and had EOA 1.73\±0.59 cm 2  and EOAi 0.91\±0.30 cm 2 /m 2 , respectively. Conclusions: Aortic valve replacement with On-X 21 mechanical prostheses in patients with small aortic root is associated with low mortality and good clinical as well as echocardiographic mid-term results.",
author="Perek, Bartłomiej
and Paluszkiewicz, Lech
and Misterski, Marcin
and Sarnowski, Wojciech
and Jemielity, Marek",
pages="137--142",
url="https://www.termedia.pl/Kardiochirurgia-doroslych-Aortic-valve-replacement-with-On-X-21-mechanical-prosthesis-in-patients-with-small-aortic-root-8211-5-years-8217-experience,40,8401,1,1.html"
}