摘要
目的探讨心脏MR(CMR)特征追踪技术在评价业余马拉松运动员双心室心肌应变中的价值。方法2021年3月至5月按入组标准招募业余马拉松运动员41名(马拉松运动组)及年龄相匹配的20名健康志愿者(对照组),在完成相应的运动学指标采集后,接受CMR电影序列扫描。利用CVI42软件进行CMR图像后处理,具体测量心室功能参数包括舒张、收缩末期容积(EDV、ESV),舒张、收缩末期容积指数(EDVI、ESVI),舒张、收缩末期心肌质量(MMD、MMS),舒张、收缩末期心肌质量指数(MMDI、MMSI),每搏输出量及指数(SV、SVI),心脏指数(CI)及射血分数(EF);双心室心肌应变参数包括整体径向、周向、纵向应变(GRS、GCS、GLS),整体径向、周向、纵向舒张应变率(GRSDr、GCSDr、GLSDr)。对两组人口学资料、运动学指标、心功能及心肌应变参数进行组间比较。结果与对照组相比,马拉松运动组的心率降低(P<0.001),左心室功能参数ESVI、MMD、MMDI、MMS、MMSI均增高(P<0.05),右心室功能参数EDVI、ESVI增高(P<0.05);左心室应变参数GCS、GRSDr、GCSDr、GLSDr,右心室应变参数GRSDr、GLSDr均减低(P<0.05)。结论业余马拉松运动员表现出心肌应变能力下降,左心室心肌质量增加。在EF正常情况下,双心室舒张期应变率可以早期敏感发现心室功能代偿性变化。
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.
作者
凌小莉
刘承宏
赵凯跃
刘敏
黄珍媚
丁建平
王子荣
Ling Xiaoli;Liu Chenghong;Zhao Kaiyue;Liu Min;Huang Zhenmei;Ding Jianping;Wang Zirong(Department of Radiology,Affiliated Hospital of Hangzhou Normal University,Hangzhou Marathon Sports Medicine Research Institute,Hangzhou 310015,China)
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2023年第12期1278-1283,共6页
Chinese Journal of Radiology
基金
浙江省基础公益研究计划项目(LGF21H180001)。
关键词
磁共振成像
马拉松
心室功能
心肌应变
Magnetic resonance imaging
Marathon
Ventricular function
Myocardial strain
作者简介
通信作者:王子荣,Email:wangzirong.1981@163.com。
