Left ventricular function in endurance-trained children by tissue Doppler imaging.
Left ventricular function in endurance-trained children by tissue Doppler imaging.
复制标题
通过组织多普勒成像观察耐力训练儿童的左心室功能。
DOI：
10.1249/01.mss.0000139900.67704.07
复制
发表时间：
2004
影响因子：
4.1
通讯作者：
P. Obert
中科院分区：
文献类型：
--
作者：
S. Nottin;L. Nguyen;M. Terbah;P. Obert
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对于儿童和成人，耐力训练会增加静息每搏输出量，主要是由于左心室 (LV) 充盈增加。
目的
评估导致心脏充盈增加的左心室形态和功能改变在儿童和年轻人中是否相似。
方法
对 10 名成年自行车手、13 名年龄匹配的久坐对照者、12 名男孩自行车手和 11 名未经训练的男孩进行标准超声心动图（左心室形态和功能）和组织多普勒成像（左心室松弛特性）评估。
结果
在我们接受过耐力训练的成年人中，左心室形态适应包括左心室内径、壁厚度和质量的增加。然而，训练对儿童左心室形态的影响是不同的，因为与年龄匹配的不活跃男孩相比，我们的儿童自行车运动员没有观察到真正的心脏肥大。通过 TDI 评估的相关训练对左心室收缩和舒张功能的影响在男孩和男性中相似。由于左心室舒张特性的增加，受过训练的受试者的左心室舒张功能得到改善（即早期到晚期充盈速度的增加）。然而，根据 TDI 估算的左心室充盈压在受过训练的个体中与年龄匹配的对照组相似。
结论
在儿童和成人中，经过耐力训练的受试者左心室松弛特性和正常左心室充盈压的增加可能被视为生理性或“正常”肥厚的附加指标。然而，需要进一步的研究来评估在受过训练的儿童中观察到的特定左心室形态适应是否反映了青春期前训练引起的心脏肥大的减弱。
UNLABELLED
In children and adults, endurance training increases resting stroke volume, mainly as a result of an increase in left ventricular (LV) filling.
PURPOSE
To evaluate whether the LV morphologic and functional alterations responsible for this increase in cardiac filling are similar in children and young adults.
METHODS
Standard echocardiography (LV morphology and function) and tissue Doppler imaging (LV relaxation properties) were assessed in 10 adult cyclists, 13 age-matched sedentary controls, 12 boy cyclists, and 11 untrained boys.
RESULTS
In our endurance-trained adults, LV morphological adaptations included increase in LV internal diameters, wall thickness, and mass. However, effects associated with training on LV morphology were different in children because no true cardiac hypertrophy was observed in our child cyclists compared with age-matched nonactive boys. Effects related training on LV systolic and diastolic function assessed by TDI were similar in boys and men. The LV diastolic function was improved in trained subjects (i.e., increased transmitral early to late filling velocities) as a result of an increase in LV relaxation properties. However, LV filling pressures, estimated from TDI, were similar in trained individuals compared with age-matched controls.
CONCLUSION
In both children and adults, an increase in LV relaxation properties and normal LV filling pressures in endurance-trained subjects might be taken as additional indicators for a physiologic or "normal" hypertrophy. However, further investigations are needed to evaluate whether the specific LV morphological adaptation observed in trained-children reflects a blunted trained-induced cardiac hypertrophy before puberty.
DOI：
10.1016/0735-1097(92)90385-z
发表时间：
1992-11-01
影响因子：
24
作者：
DESIMONE, G;DANIELS, SR;ALDERMAN, MH
通讯作者：
ALDERMAN, MH