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目的与方法:采用用室壁多普勒频谱图,通过测定和比较普通人和耐力运动员在静息和逐级递增负荷运动时左室E波和A波峰值速度,探讨耐力运动员在静息状态和递增负荷运动时,左室后壁主动松弛和被动充盈功能的变化。结果:(1)静息状态下,耐力运动员组A波速度显著低于普通对照组(P <0 . 0 5 )。5 0W负荷和10 0W负荷时,耐力运动员组A波速度显著低于对照组(P<0 . 0 5 ) ;15 0W负荷时,两组无显著性差异(P >0 . 0 5 ) ;2 0 0W负荷时,耐力运动员组显著高于普通对照组(P <0 .0 1)。(2 )静息状态下,普通对照组E波速度显著低于耐力运动员组(P <0 . 0 5 )。在递增负荷过程中,两组E波速度均有升高趋势,耐力组显著高于普通对照组(P <0. 0 5 )。结果提示,与心力储备相似,心脏舒张功能也有一定的储备能力。心脏舒张功能在四级递增负荷中变化较静息状态更为明显,建议在评定心脏功能,特别是心脏的舒张功能时,引入运动负荷,可能更为准确、客观。
Objective and Methods: By using the wall Doppler spectrum, by measuring and comparing the average person and endurance athletes resting and escalating load exercise left ventricular E wave and A wave peak velocity to explore endurance athletes at rest And incremental load of exercise, the left ventricular posterior wall active relaxation and passive filling changes. Results: (1) A wave velocity of endurance athletes was significantly lower than that of control group (P <0.05) at resting state. The A wave velocity of endurance athletes was significantly lower than that of control (P <0.05) at 5 0 W and 10 0 W load, but no significant difference between the two groups at 15 0 W load (P> 0.05). 2 At 0 0 W load, the endurance athletes group was significantly higher than the control group (P <0 01). (2) At rest, the E wave velocity in the control group was significantly lower than that in the endurance athletes (P <0.05). During increasing load, both groups of E wave velocity increased, endurance group was significantly higher than the control group (P <0. 05). The results suggest that, similar to cardiac reserve, diastolic function also has some reserve capacity. Cardiac diastolic function in the four incremental load changes more than the resting state is more obvious, it is recommended in assessing cardiac function, especially diastolic cardiac function, the introduction of exercise load, may be more accurate and objective.