Use of new generation small prostheses for aortic valve replacement has decreased the need for annular
enlargement and rarely increased the incidence of severe patient-prosthesis mismatch;
Of this study is to evaluate the impact of using this type of prosthesis (St.Jude. HP, Regent) on
PATINETS & METHODS:
We reviewed our experience (59) consecutive patients who had isolated and combined aortic valve
replacement in our hospital between February 2001 and February 2007.
The mean age was 36, and 60 % of patients were female.valvular disease was primarily pure aortic
regurgitation 47%, combined aortic disease 29% and pure aortic stenosis was present in 24%.
Evaluation of the impact of newly designed small prosthesis on thirty-day mortality revealed: thirty-day
mortality was 8% and the strongest independent predictors in multivariate analysis in decreasing order of
statistical power were functional class IV, patient-prosthesis mismatch, advanced age (65 year), very
small valve size (labeled valve size 17-mm), isolated aortic valve replacement surgery without other
concomitant procedure (P=0.022) and obese patients (body mass index >33 kg/ m²).