Mid-term hemodynamic results of bioprosthetics of the aortic valve with a prosthesis with a unique “Easy change” system

Aim: To assess the hemodynamic results of using the xenopericardial biological prosthesis “MedEng-BIO” with the “easy change” system in the aortic position in the mid-term period.Material and Methods. In the cardiac surgery department No. 1 of Cardiology Research Institute, Tomsk NRMC, from October 2016 to January 2024, 341 patients (155 women and 186 men) underwent aortic valve replacement surgery using an innovative “MedEng-BIO” bioprosthesis with the “easy change” system. The average age of the patients was 67.6 ± 6.6 years. The study included 190 patients (88 women and 102 men) who underwent aortic valve replacement using the innovative “MedEng-BIO” bioprosthesis with the “easy change” system in the period from January 2017 to January 2022. The average age of the patients was 67.6 ± 6.6 years. The average pressure gradient on the aortic valve before surgery was 48.2 ± 13.5 mmHg. The effective area of the aortic valve opening averaged (EАO) - 0.72 ± 0.2 cm2 . Control echocardiographic studies of left ventricular (LV) function and aortic bioprosthesis after surgery were performed on the 10th-14th day after surgery and 3-5 years after discharge using Vivid 7, GE and IE 33 (Philips) devices.Results. Control echocardiographic studies conducted in the mid-term period allowed us to establish that the hemodynamic characteristics of “MedEng-BIO” aortic prostheses in the aortic position remain satisfactory. The average pressure gradient on the “MedEng-BIO” prostheses of 21 sizes was 22.6 mmHg, 23 with a size of - 15.1 mmHg and 25 with a size of 10.3 mmHg.Conclusion. Based on the data obtained, it can be concluded that xenopericardial “MedEng-BIO” bioprostheses with the “easy change” system correct intracardiac hemodynamics well over a follow-up period of more than 3 years and show no signs of degeneration.