Can Moderate Patient Prosthesis Mismatch Be Tolerated in a Selected Group of Patients with Aortic Valve Replacement?

Introduction: In this study, we aimed to determine the incidence of patient prosthesis mismatch (PPM) and its effects on ejection fraction (EF), gradients, and late survival. Methods: 200 patients who underwent isolated mechanical AVR between March 2013 and May 2016 were retrospectively evaluated based on patient records. Results: 200 patients were included in the study. No PPM was detected in 42 (21%) patients, moderate PPM in 122 (61%), and severe PPM in 36 (18%) patients. A significant decrease was found in all groups in terms of mean valve gradients and LVMI (preoperative LVMI compared with postoperative LVMI at the 12th month) (P < .001). A 30% decrease in mean LVMI in the no PPM and moderate PPM groups and a 20% decrease in the severe PPM group were detected at the 6th month. Conclusion: In our postoperative data, we found that EF was preserved, the transvalvular gradient reduced, and LVMI decreased. There was no difference in mortality rates between the control (no PPM) group and the moderate PPM group. Taking into account our patient groups, we can say that no-to-moderate PPM has no major effect on left ventricular remodeling in patients with preserved left ventricular functions.