The change in left ventricular mass after mitral valve replacement surgery

Abstract

Abstract Background Mitral valve lesions caused by rheumatic heart disease and mitral valve lesions caused by degenerative valvular disease are the most common types of mitral valve lesions in China. Mitral valve replacement surgery is an effective treatment for mitral regurgitation, and echocardiography remains a method of assessing perioperative disease severity. This study explores changes in the left ventricle before and after mitral valve replacement surgery from multiple angles and indicators. Methods A retrospective study was conducted on the baseline data and perioperative echocardiography data of 80 patients with rheumatic or degenerative mitral valve disease from September 2020 to March 2022, and the relevant indicators of the perioperative period of patients were obtained by calculating the LVM (left ventricular mass), LVMI (left ventricular mass index ) and RWT(relative wall thickness), and the patients were divided into two groups, A and B, of which group A (rheumatic heart disease, n = 50) and group B (degenerative valvular disease, n = 30). The Mann-Whitney nonparametric test was performed on the LVM and other indicators before and after surgery in the two groups. Paired t-tests are performed for the entire patient undergoing mitral valve replacement surgery before, and after surgery. Look at changes in the left ventricle. Results LVM, LVMI left ventricular volume and left ventricular size of patients in group A were smaller than those in group B, and the differences were statistically significant (P < 0.05), while the relative wall thickness of the two groups was not significantly changed, and the difference was not statistically significant (P > 0.05). The left ventricular quality, LVMI, left ventricular volume and left ventricular size were all regressed compared with the preoperative indexes in 1 week after surgery and 1 month after surgery, and the differences were statistically significant (P < 0.05), and the left ventricular quality, left ventricular volume and left ventricular size were not significantly changed 3 months after surgery and 1 month after surgery, and the difference was not significant (P > 0.05), while the LVMI was still different and statistically significant (P > 0.05). Conclusions In terms of preoperative treatment, the effect of mitral regurgitation caused by rheumatic valvular disease on the left ventricle is smaller than that of degenerative valvular disease. The mass, volume and size of the left ventricle decreased after surgery; The quality, volume, and size of the left ventricle stabilized 3 months after surgery.