二维斑点追踪技术对业余马拉松运动员左心室收缩功能的研究

目的:应用二维斑点追踪技术评价业余马拉松运动员左心室收缩功能。方法:选取2019年1月至2020年6月在杭州市招募的业余马拉松运动员59例，根据参加马拉松运动时限分为A组(参加马拉松运动时间>2～5年)和B组(参加马拉松运动时间>5年)；另选取同期在医院体检健康志愿者31例为对照组。使用常规超声心动图结合二维斑点追踪技...

Assessment of left ventricular systolic function in amateur marathoners by two-dimensional speckle tracking echocardiography

Objective To assess the left ventricular(LV)systolic function in amateur marathoners by two-dimensional speckle tracking echocardiography.Methods A total of 59 amateur marathon runners were recruited from January 2019 to June 2020 in Hangzhou and were divided into group A(>2-5 years)and group B(>5 years)based on their time of participating in marathon.Thirty-one healthy volunteers were enrolled from Affiliate Hospital of Hangzhou Normal University during the same period as a control group.Conventional echocardiography combined with two-dimensional speckle tracking imaging were applied to all the subjects to obtain interventricular septum diastolic thickness(IVSd),LV posterior wall thickness(PWd),LV end-diastolic diameter(LVEDd),relative wall thickness(RWT)and LV mass(LVM),LV end-diastolic volume(EDV),LV end-systolic volume(ESV)and stroke volume(SV),LV ejection fraction(LVEF),LV global longitudinal strain(GLS),and global circumferential strain(GCS).Pre-marathon,1 hour and 4th day post-marathon echocardiography were performed in amateur marathon runners.Results Compared with the control group,group A amateur marathon runners showed significant increases in IVSd,PWd,LVEDd,RWT and LVM(all P<0.05);In addition,the IVSd,PWd,LVEDd,RWT,LVM,EDV,ESV and SV in group B runners were further increased compared to those of group A runners(all P<0.01).The LVEF and pre-marathon GCS showed no statistically significant differences among the three groups(all P>0.05),while the pre-marathon GLS showed a statistically significant difference among the three groups(P<0.01).Compared with group A runners,the pre-marathon,1 hour and 4th day post-marathon GLS and 1 hour post-marathon GCS were significantly decreased in group B runners(all P<0.01);In intra-group comparison,1 hour post-marathon GLS was significantly decreased in relative to pre-marathon and 4th day post-marathon GLS in both group A and B(all P<0.05).One hour post-marathon GCS was significantly decreased compared with pre-marathon GCS in group B(P<0.05).Conclusions Amateur runners who have participated in long time marathon have reduced LV longitudinal strains and transient post-marathon decreases in LV systolic function.