EVALUATION OF LEFT VENTRICULAR FUNCTION IN HYPERTENSIVE ATHLETIC PATIENTS WITH DIFFERENT CIRCADIAN RHYTHMS USING STRATIFIED STRAIN TECHNIQUE

Abstract

Purpose: With the stratified strain approach, the changes in the longitudinal mechanical condition of the left ventricular myocardium in hypertensive athletic patients with a normal left ventricular ejection fraction (LVEF) have been evaluated. Materials and Methods: Based on circadian rhythm, 48 dippers and 53 non-dippers are selected among 103 hypertension athletic patients with normal LVEF (LVEF > 50%). The stratified strain approach is used to measure the longitudinal strain (GLS) of the subendocardial, middle, and epicardial myocardium during left ventricular systole. The relationship between the stratified strain and the circadian rhythm in hypertensive individuals has been analysed. Results: show that the levels of IVST, LVPWT, and LVMI in the non-dipper group are considerably higher than those in the dipper group, while there is not statistically significant between the two groups in terms of LVDd, LVDs, LA, or EF. Myocardial strain analysis reveals that the left ventricular long axis strain (GLS) in the non-dipper group is considerably greater than that in the dipper group, And the difference is statistically significant (P< 0.05). But the GLSendo between the non-dipper group and the dipper group did not vary significantly (P<0.05). In GLSMid, GLSepi, there is no significant difference, and the difference is not statistically significant(P>0.05). Conclusion：Ultrasonic stratified strain technique can quantitatively measure and analyze the longitudinal stratified strain of the myocardium in each segment of the left ventricle in hypertensive athletic patients and evaluate their early left ventricular mechanics changes, providing a better diagnostic method for early clinical determination of myocardial involvement in athletic patients.