Myocardial Adaptation to Short-term High-intensity Exercise in Highly Trained Athletes

详细信息    查看全文

• 作者：Tomas G. Neilan ; MD^?/sup> ; Thanh-Thao Ton-Nu ; MD^?/sup> ; Davinder S. Jassal ; MD^?/sup> ; Zoran B. Popovic ; MD^§ ; ; Pamela S. Douglas ; MD^&Dagger ; ; Elkan F. Halpern ; PhD^&dagger ; ; Jane E. Marshall ; RDCS^?/sup> ; James D. Thomas ; MD^§ ; ; Michael H. Picard ; MD^?/sup> ; Danita M. Yoerger ; MD^?/sup> ; Malissa J. Wood ; MD^?/sup> ; ^{mjwood@partners.org}
• 刊名：Journal of the American Society of Echocardiography
• 出版年：2006
• 出版时间：October 2006
• 年：2006
• 卷：19
• 期：10
• 页码：1280-1285
• 全文大小：102 K

文摘

We aimed to clarify the myocardial adaptation to short-term high-intensity exercise among trained athletes. We screened 17 participants in the 2004 World Indoor Rowing Championships before and after a 2000-m sprint. Echocardiography included standard measurements and tissue Doppler¨Cderived strain (¦Å), strain rate, and 2-dimensionally derived speckle-tracking imaging for left ventricular (LV) torsion. LV volumes and ejection fraction were unchanged after exercise. There was a reduction in early and an increase in late diastolic filling velocities and a decrease in the flow propagation velocity. Annular systolic velocities, slope of the systolic acceleration, septal and lateral ¦Å, and speckle tracking¨Cderived torsion were increased. The increased LV torsion was a result of increased basal and apical rotation. Right ventricular apical ¦Å decreased. In conclusion, maximal intensity short-duration exercise was associated with attenuation of LV diastolic function, augmentation of LV systolic function, and a reduction in apical right ventricular contractility.