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首页> 外文期刊>Scandinavian journal of medicine & science in sports. >Left ventricular biomechanics in professional football players
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Left ventricular biomechanics in professional football players

机译：职业足球运动员的左心室生物力学

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Chronic exercise induces adaptive changes of left ventricular ( LV ) ejection and filling capacities which may be detected by novel speckle‐tracking echocardiography ( STE ) and tissue Doppler imaging ( TDI )‐based techniques. A total of 103 consecutive male elite Norwegian soccer players and 46 age‐matched healthy controls underwent echocardiography at rest. STE was used to assess LV torsional mechanics and LV systolic longitudinal strain ( LS ). Diastolic function was evaluated by trans‐mitral blood flow, mitral annular velocities by TDI , and LV inflow propagation velocity by color M‐mode. Despite similar global LS , players displayed lower basal wall and higher apical wall LS values vs controls, resulting in an incremental base‐to‐apex gradient of LS . Color M‐mode and TDI ‐derived data were similar in both groups. Peak systolic twist rate ( TWR ) was significantly lower in players (86.4±2.8 vs controls 101.9±5.2?deg/s, P .01). Diastolic untwisting rate ( UTWR ) was higher in players (?124.5±4.2 vs ?106.9±6.7?deg/s) and peaked earlier during the cardiac cycle (112.7±0.8 vs 117.4±2.4% of systole duration, both P .05). Untwisting/twisting ratio (?1.48±0.05 vs ?1.11±0.08; P .001) and untwisting performance (= UTR / TW ; ?9.25±0.34 vs ?7.38±0.40 s ?1 , P .01) were increased in players. Augmented diastolic wall strain ( DWS ), a novel measure of LV compliance in players, was associated with improved myocardial mechanical efficiency. The described myocardial biomechanics may underlie augmented exertional cardiac function in athletes and may have a potential role to characterize athlete′s heart by itself or to distinguish it from hypertensive or hypertrophic cardiomyopathy.
机译：慢性锻炼诱导左心室（LV）喷射和填充能力的适应性变化，其可以通过新颖的散斑跟踪超声心动图（STE）和组织多普勒成像（TDI）基础的技术来检测。共有103人连续103名男性精英挪威足球运动员和46岁常见的健康控制在休息的超声心动图。 STE用于评估LV扭转力学和LV收缩纵向应变（LS）。通过TDI的转翼血流，二尖瓣环形速度评估舒张功能，并通过COLOR M模式通过LV流入传播速度进行评估。尽管Global LS类似，玩家展示了较低的基底壁和更高的顶端壁LS值VS控制，导致LS的增量基础到APEX梯度。两组中的颜色M模式和TDI相似的数据相似。球员的收缩速率（TWR）在球员中显着较低（86.4±2.8 VS控制101.9±5.2？DEG / S，P＆ 01）。球员的舒张式无捻速率（UTWR）较高（？124.5±4.2 Vs？106.9±6.7°？DEG / s）在心脏周期之前较早达到峰值（112.7±0.8 Vs 117.4±2.4％的Systole持续时间，两个P＆ 05）。不驾驶/扭曲比率（？1.48±0.05 Vs？1.11±0.08; p＆ 0.001）和无力性能（= UTR / Tw;？9.25±0.34 Vs？7.38±0.40s≤1，p <.01）在球员中增加。增强舒张壁菌株（DWS），一种新的球员LV遵从性的衡量标准，与改善的心肌机械效率有关。所描述的心肌生物力学可能在运动员中增加了增强的担保心功能，可能具有潜在的作用，使运动员的心脏自身或区别于高血压或肥厚性心肌病。

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