Grégoire J M, Vandenbossche J L, Messin R, Englert M
Acta Clin Belg. 1989;44(6):388-95. doi: 10.1080/17843286.1989.11718048.
Although diastolic function is altered in left ventricular hypertrophy due to aortic stenosis or systemic hypertension, it has been shown to be normal in athletes. To analyze the reason for this discrepancy, we have studied left ventricular masses and volumes and diastolic flow velocities in 13 ultraendurance athletes and in 8 sedentary subjects as a control group by M-mode (TM), two-dimensional (2D) and Doppler echocardiography. Significant differences in the measurements of mass and volume have been found depending upon the method used. Considering that two-dimensional echocardiography is more appropriate for estimations of LV mass and LV volume, especially when the shape of the left ventricle is modified, overestimation of LV mass and underestimation of LV volume in ultraendurance athletes by TM could be explained by an elongation of LV cavity in athletes. Doppler velocimetry showed similar results in athletes and control subjects. We suggest that those LV configurational changes partly explain the preservation of diastolic function in athletes by restoring in diastole the energy stored in systole.
尽管因主动脉瓣狭窄或系统性高血压导致左心室肥厚时舒张功能会发生改变，但研究表明运动员的舒张功能是正常的。为分析这种差异的原因，我们通过M型（TM）、二维（2D）和多普勒超声心动图，对13名超耐力运动员和8名久坐不动的受试者作为对照组进行了左心室质量、容积及舒张期血流速度的研究。根据所使用的方法，在质量和容积测量上发现了显著差异。考虑到二维超声心动图更适合估算左心室质量和左心室容积，尤其是当左心室形状发生改变时，TM对超耐力运动员左心室质量的高估和左心室容积的低估可能是由于运动员左心室腔的延长所致。多普勒测速法在运动员和对照受试者中显示出相似的结果。我们认为，这些左心室形态变化部分解释了运动员舒张功能得以保留的原因，即通过在舒张期恢复收缩期储存的能量。
