Warburton Darren E R, McGavock Jonathon, Welsh Robert C, Haykowsky Mark J, Quinney H Arthur, Taylor Dylan, Dzavik Vladimir
Faculty of Physical Education and Recreation, Div. of Cardiology, Faculty of Medicine, Univ. of Alberta, Edmonton, AB, T6G 2M7.
Can J Appl Physiol. 2003 Apr;28(2):153-64. doi: 10.1139/h03-012.
The objectives of this study were to evaluate the prevalence of late potentials (LP) in female triathletes before and after prolonged strenuous exercise (PSE), and to determine whether LP are related to greater left ventricular (LV) dimensions and/or mass. Thirteen female triathletes were examined immediately before (Pre), one hour after (Post), and 24 to 48 hours after PSE (Recovery) using signal-averaged electrocardiography (SAECG). Late potentials were evaluated by two or more standard SAECG anomalies. Left ventricular dimensions and mass were measured Pre using two-dimensional echocardiography. Results revealed that no significant differences existed between Pre, Post, and Recovery in the SAECG parameters. Four athletes displayed LP during Pre. The incidence of LP during did not increase Post. There were no significant relationships between LV dimensions or mass and SAECG parameters. In conclusion, a small portion of female triathletes display LP before and after PSE, which are not worsened by PSE nor related to increased LV dimensions and/or mass.
本研究的目的是评估长时间剧烈运动（PSE）前后女性铁人三项运动员中晚电位（LP）的发生率，并确定LP是否与更大的左心室（LV）尺寸和/或质量相关。使用信号平均心电图（SAECG）对13名女性铁人三项运动员在PSE前（Pre）、后1小时（Post）以及PSE后24至48小时（恢复）进行了检查。通过两个或更多标准SAECG异常来评估晚电位。使用二维超声心动图在Pre时测量左心室尺寸和质量。结果显示，SAECG参数在Pre、Post和恢复之间没有显著差异。四名运动员在Pre期间显示出LP。Post期间LP的发生率没有增加。LV尺寸或质量与SAECG参数之间没有显著关系。总之，一小部分女性铁人三项运动员在PSE前后显示出LP，PSE不会使其恶化，也与LV尺寸增加和/或质量增加无关。
