Evaluation of the effect of hemodialysis on left ventricular longitudinal strain function of myocardium in patients with uremia by velocity vector imaging

Abstract

Objective To investigate the velocity vector imaging (VVI) technique to evaluate hemodialysis on left ventricular function and application value of longitudinal strain effect of three myocardial layers. Method Echocardiography was performed in 35 cases of uremia patients with high flux hemodialysis, respectively before and after dialysis within 2H. Use VVI software to analyze the two-dimensional images after conventional measurement and image acquisition and obtain 17 segments of left ventricular peak systolic longitudinal strain (LPS) and layered whole layer strain. Results Left atrial diameter (LAD), left ventricular end diastolic and end systolic diameter (LVIDd, LVIDs), and left ventricular diastolic end and end systolic volume (EDV, ESV), stroke volume (SV)were reduced after dialysis(P 0.05).Layered strain parameter: Compared with before dialysis, the peak systolic longitudinal strain (LPS) of left ventricular global layer and inner layer,the global layer, subendocardial layer, middle layer and epicardial layer of the basal segment,the global layer and subendocardial layer of middle segment were lower than before dialysis. The difference was statistically significant (P 0.05).Single hemodialysis has a negative effect on left ventricular function. Therefore, it is necessary to monitor the heart function in hemodialysis patients to avoid the occurrence of cardiovascular events during dialysis and after dialysis. Conclusion VVI can be more accurate to evaluate the effect of blood dialysis in uremic patients with left ventricular myocardial regional and global function, and has potential applications in clinical practice.