心律失常运动员心输出量的研究

近年来由于训练强度不断增大,高水平运动员心律失常的发生率显著增加。本文研究资料表明,男心律失常组安静时心搏量明显大于正常组(P<0.05),而运动后心搏量降低(正常组心搏量增加),说明心律失常的运动员心脏储备能力差,心脏泵血功能降低,应予慎重对待。

A STUDY OF THE CARDIAC OUTPUT IN ATHLETES WITH ARRHYTHMIA

The pump function of heart --- cardiac output (CO) and stroke volume (SV) were measured in20 athletes with arrhythmia and 10 athletes without arrhythmia at rest and after exercise by usingcardiac output computer which is based on the dye dilution method. The value of SV was similar to that reported by other authors determined by the Fick me-thod. At rest, the value of CO, SV and cardiac index (CI) in the male athletes with arrhythmia weresignificantly higher than those in the normal athletes (P<0.05). The circulation time of the normalathletes was longer than normal untrained. After exercise, the values of SV were increased in the no-rmal athletes but were decreased in those with arrhythmia. The results showed that the cardiac rese-rve was greater in normal athletes and the pump function of heart in athletes with arrhythmia waslower. The SV varied with different types of arrhythmia. When the changes of ECG during exercisewere considered together with the changes of SV, the properties of different arrhythmias could bedistinguished. The values of SV were increased right after exercise (P<0.05) in athletes with occa-sional premature beats which disappeared during exercise. In the athietes with atrial fibrillation, bilate-ral bundle branch block, Ⅲ A-VB, and frequent premature beats the values of SV decreased afterexercise while the ECG remained as it was or only change a little during exercise. The results sugge-sted that the pump function of heart and the physical performance were lower in the latter group ofathletes. The study of the values of CO and SV in athletes with arrhythmia may be used as criteriaof hemodynamics for arranging their training programs.