A study on biventricular myocardial strain characteristics of amateur marathon runners based on cardiac MR feature tracking technique
10.3760/cma.j.cn112149-20230918-00206
- VernacularTitle:心脏MR特征追踪技术对业余马拉松运动员双心室心肌应变的研究
- Author:
Xiaoli LING
1
;
Chenghong LIU
;
Kaiyue ZHAO
;
Min LIU
;
Zhenmei HUANG
;
Jianping DING
;
Zirong WANG
Author Information
1. 杭州师范大学附属医院放射科 杭州市马拉松运动医学研究所，杭州 310015
- Keywords:
Magnetic resonance imaging;
Marathon;
Ventricular function;
Myocardial strain
- From:
Chinese Journal of Radiology
2023;57(12):1278-1283
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the changes of biventricular myocardial strain in amateur marathon runners using the cardiac MR feature tracking (CMR-FT) technique.Methods:Forty-one amateur marathon runners (marathon exercise group) and 20 age-matched healthy volunteers (control group) were recruited according to the inclusion criteria. After the kinematic parameters were obtained, all subjects underwent a CMR cine sequence imaging. The CMR images were post-processed using CVI42 software. The biventricular function parameters including end-diastole/end-systolic volume (EDV/ESV), end-diastole/end-systolic volume index (EDVI/ESVI), end-diastole/end-systolic myocardial mass (MMD/MMS), end-diastole/end-systolic myocardial mass index (MMDI/MMSI), stroke volume and index (SV/SVI), cardiac index (CI) and ejection fraction (EF), as well as the biventricular myocardial strain parameters including global radial/circumferential/longitudinal strain (GRS/GCS/GLS), global radial/circumferential/longitudinal diastolic strain rate (GRSDr/GCSDr/GLSDr) were measured and calculated. Demographic data, kinematic index, cardiac function and myocardial strain parameters were compared between the two groups.Results:Compared with the control group, the exercise group showed significant decrease heart rates ( P<0.001). It was found that the left ventricular function parameters (ESVI, MMD, MMDI, MMS, MMSI) and the right ventricular function parameters (EDVI, ESVI) of the exercise group were significantly higher than those of control group (all P<0.05); while the left ventricular strain parameters (GCS, GRSDr, GCSDr, GLSDr) and the right ventricular strain parameters (GRSDr, GLSDr) were of the exercise group were significantly lower than those of control group (all P<0.05). Conclusions:Amateur marathon runners have lower myocardial strain capacity and higher left ventricular myocardial mass. The ventricular diastolic strain rate may sensitively reflect the compensatory changes of ventricular function with the normal ejection fraction.
