Effect of prosthesis-patient mismatch on survival after aortic valve replacement using mechanical prostheses in patients with aortic stenosis.

Background: This study assessed the effects of prosthesis-patient mismatch (PPM) after aortic valve replacement (AVR) using mechanical prostheses in patients with aortic stenosis.

Methods: A total of 124 patients with aortic stenosis who underwent AVR with mechanical prostheses were followed (mean 9.1+/-4.