水球运动员不同机能状态下的超声多普勒和抗心阻血流图研究

Study of Ultrasonic Dopplor and Impedance Cardiogram on Polo Playors in the Different Functional States

本文采用超声多普勒法和心阻抗法研究了13名一级男子水球运动员和15名普通大学生在安静时、运动负荷中和恢复期升主动脉血流动力学指标和心泵功能的变化情况。实验结果表明,能间接反映心肌收缩性的升主动脉血流加速度峰值(PKA)、血流速度峰值(PKV),在安静时运动员与大学生之间无显著差异;运动员每搏量(SV)大于大学生,其主要原因是左室射血时间(LVET)较长;递增运动负荷中,运动员PKA显著低于大学生,提示在定量负荷时,运动员以较低的心肌收缩性即可完成。实验发现水球运动员以较低的心律和较高的每搏量保证机体供血。实验表明,超声多普勒法是一种较好的无创性运动员心血管机能研究手段。

It was carried out that the studies of the hemodynamic indexes of the ascending aorta and cardiac pump functions at the different states of the rest, exercise and recover on 13 polo playors (the First Grade Athletets) and 15 students in the common university by means of Ultrasonic Dopplor and impedance Cardiogram Methods. The experimental results show that, in terms of the accelaration maximum (PKA) and the velocity maximum (PKV) of blood flow in the ascending aorta, which could reflect cardiac contractibility indirectly, in the rest state, there is no singnificant difference between the athletes and the students; But the athletes' stroke o nes (SV) are larger than that of the students', due to the former' s longer shooting time of the left ventocle of the heart; In the state of the incremental workload exercise, he?a?h?e?es' P?As are much lower than that of t?e stuaents. w(?)c(?)suggests that the athletes co?ld ?noertake the constant workload exercise with the relatively lower cardiac contracnbility. It is also found in the experiment that the playor's guatantee of the blood supp?y is (?)o g(?)he ower heart rate and the higher SV. The experiment proves that the Ultrsonic Dopplor Method is a good and noninvasive mean for researching athlete' scardiovascular func?ons.