Dynamics of Left Ventricular Diastolic Filling during Progressive Exercise
- VernacularTitle:递增运动负荷时男性青年左室舒张期血流动力学变化
- Author:
Biao SUN
;
Jizheng MA
- Publication Type:Journal Article
- Keywords:
echocardiogram, mitral transmitral pressure gradient, mitral transmitral flow velocities
- From:
Chinese Journal of Sports Medicine
2003;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
This study was to assess diastolic filling dynamics of the left ventricle during progressive upright cycle exercise in young men. The results showed that the diastolic filling period shortened from 0.581?0.14s at rest to 0.129?0.04s at peak exercise; the peak transmitral flow velocities increased from 0.72?0.07m/s at rest to 1.60?0.10m/s at peak exercise and the mean transmitral flow velocities increased from 0.41?0 03m/s at rest to 0.96?0.13m/s at peak exercise; the peak and mean transmitral pressure gradients rose fivefold from rest to peak exercise; the mitral flow volume per beat rose by 38% at 100W workloads and then remained stable. Conclusions Increases in transmitral pressure gradients with exercise may serve principally to augment the velocity of ventricular filling with the progressively shortening diastolic time period.
