Bougault V, Nottin S, Doucende G, Obert P
Department of Sciences, University of Avignon, 74 rue Louis Pasteur, Avignon, France.
Int J Sports Med. 2008 May;29(5):395-400. doi: 10.1055/s-2007-965356. Epub 2007 Sep 19.
Tissue Doppler imaging (TDI) is an echocardiographic technique used during exercising to improve the accuracy of a cardiovascular diagnostic. The validity of TDI requires its reproducibility, which has never been challenged during moderate to maximal intensity exercising. The present study was specifically designed to assess the transmitral Doppler and pulsed TDI reproducibility in 19 healthy men, who had undergone two identical semi-supine maximal exercise tests on a cycle ergometer. Systolic (S') and diastolic (E') tissue velocities at the septal and lateral walls as well as early transmitral velocities (E) were assessed during exercise up to maximal effort. The data were compared between the two tests at 40 %, 60 %, 80 % and 100 % of maximal aerobic power. Despite upper body movements and hyperventilation, good quality echocardiographic images were obtained in each case. Regardless of exercise intensity, no differences were noticed between the two tests for all measurements. The variation coefficients for Doppler variables ranged from 3 % to 9 % over the transition from rest to maximal exercise. The random measurement error was, on average, 5.8 cm/s for E' and 4.4 cm/s for S'. Overall, the reproducibility of TDI was acceptable. Tissue Doppler imaging can be used to accurately evaluate LV diastolic and/or systolic function for this range of exercise intensity.
组织多普勒成像（TDI）是一种在运动期间使用的超声心动图技术，用于提高心血管诊断的准确性。TDI的有效性要求其具有可重复性，而在中等至最大强度运动期间，其可重复性从未受到质疑。本研究专门设计用于评估19名健康男性的二尖瓣多普勒和脉冲TDI的可重复性，这些男性在自行车测力计上进行了两次相同的半仰卧位最大运动测试。在运动至最大努力期间，评估了室间隔和侧壁的收缩期（S'）和舒张期（E'）组织速度以及二尖瓣早期速度（E）。在最大有氧功率的40%、60%、80%和100%时，对两次测试的数据进行了比较。尽管存在上身运动和过度通气，但在每种情况下均获得了高质量的超声心动图图像。无论运动强度如何，所有测量的两次测试之间均未发现差异。从静息到最大运动的转变过程中，多普勒变量的变异系数范围为3%至9%。E'的随机测量误差平均为5.8 cm/s，S'的随机测量误差平均为4.4 cm/s。总体而言，TDI的可重复性是可以接受的。对于该运动强度范围，组织多普勒成像可用于准确评估左心室舒张和/或收缩功能。
