The health of athletes has been recognized as a worldwide public concern with more reported sudden cardiac deaths (SCD). Therefore, early detection of abnormal heart function in athletes can help reduce the risk of exercise. A novel valid non-invasive method to evaluate left ventricular (LV) myocardial work (MW) using LV pressure-strain loop (PSL), was used in this paper to explore LV systolic function in young male strength athletes. Thirty-six professional young male strength athletes (the athlete group) and 32 healthy, age-matched young men (the control group) were involved in the study. The LVMW parameters were calculated as the area of PSL by two-dimensional speckle tracking echocardiography (2D-STE) and peak systolic LV pressure. The differences between two groups of data and the predictive efficacy of MW parameters for LV systolic function were analyzed. The athlete group had significantly higher values of global wasted myocardial work (GWW) and peak strain dispersion (PSD) than did the control group (P<0.05). Global myocardial work index (GWI), global constructive myocardial work (GCW) and global longitudinal strain (GLS) were lower in the athlete group than that in the control group, although statistical significance was not reached (P>0.05). Due to the proportion of GWW and GCW, statistically significant reduction was found in global myocardial work efficiency (GWE) in the athlete group. Conventional echocardiography parameters were well correlated with GWW and GWE (P<0.05). The best predictor of LV myocardial contractile performance in the athletes using receiver operating characteristic curve (ROC) was GWE, with the area under ROC (AUC) of 0.733, sensitivity of 83.3% and specificity of 59.4%. Subclinical changes have appeared in the hearts of young male strength athletes after long-term intensive exercise and LVMW parameters by PSL play an important role in the evaluation of athlete’s LV contractile performance.

中文翻译：

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无创压力应变环区对年轻男子力量运动员左心室收缩功能的评估

运动员的健康已被公认为全球公众关注的问题，心脏性猝死 (SCD) 的报道越来越多。因此，及早发现运动员心脏功能异常有助于降低运动风险。本文使用了一种使用 LV 压力-应变环 (PSL) 评估左心室 (LV) 心肌功 (MW) 的新型有效非侵入性方法，以探索年轻男性力量运动员的 LV 收缩功能。36 名职业年轻男性力量运动员（运动员组）和 32 名健康、年龄匹配的年轻男性（对照组）参与了这项研究。LVMW 参数通过二维斑点跟踪超声心动图 (2D-STE) 和峰值收缩期 LV 压力计算为 PSL 的面积。分析了两组数据之间的差异以及 MW 参数对 LV 收缩功能的预测功效。运动员组的整体心肌无用功（GWW）和峰值应变离散度（PSD）值显着高于对照组（P<0.05）。运动员组的总体心肌功指数（GWI）、总体建设性心肌功（GCW）和总体纵向应变（GLS）均低于对照组，但未达到统计学意义（P>0.05）。由于 GWW 和 GCW 的比例，运动员组的整体心肌工作效率 (GWE) 有统计学意义的降低。常规超声心动图参数与 GWW 和 GWE 密切相关（P<0.05）。使用受试者工作特征曲线（ROC）的运动员左室心肌收缩性能的最佳预测因子是 GWE，其 ROC 下面积（AUC）为 0.733，敏感性为 83.3%，特异性为 59.4%。长期高强度运动后，年轻男性力量运动员的心脏出现了亚临床变化，PSL的LVMW参数对运动员LV收缩性能的评价具有重要作用。