头低位卧床模拟失重状态下房室平面运动的定量组织速度成像

发布时间：2018-04-16 22:00

本文选题：房室平面 + 定量组织速度成像　；参考：《第四军医大学学报》2009年10期

【摘要】：目的:应用定量组织速度成像(Quantitative tissue velocity imaging,QTVI)分析头低位卧床模拟失重状态下的房室平面运动,评价模拟失重对左心室收缩与舒张功能的影响.方法:健康青年男性志愿者16名,-6°头低位连续卧床模拟失重,分别于卧床前和模拟失重第10日及20日行心脏彩超检查,应用QTVI获取心尖四腔、左室两腔和左室长轴观上房室平面6个位点的运动速度曲线,测量收缩期波(Vs),舒张早期波(Ve)和舒张晚期波(Va)的峰值速度,计算Ve/Va,结果采用统计软件SPSS11.0进行统计学分析.结果:①收缩期运动速度(Vs):模拟失重与卧前比较,无显著性差异.②舒张期早期运动速度(Ve):模拟失重第10日有3个位点较卧前减低;第20日有5个位点较卧前减低,有显著性差异(P0.05);模拟失重第20日与10日比较,后间隔运动速度减低(P0.05).③舒张期晚期运动速度(Va):模拟失重第20日,侧位点较卧前减低,有显著性差异(P0.05).④Ve/Va:模拟失重第20日,前间隔及后间隔位点降低,具有显著性差异(P0.05).结论:模拟失重主要影响左心室舒张功能,且随模拟失重时间的延长而加重,对左心室收缩功能则无明显影响.
[Abstract]:Aim: to evaluate the effects of simulated weightlessness on left ventricular systolic and diastolic function by quantitative tissue velocity imaging (QTVI).Methods: 16 healthy young male volunteers were subjected to continuous bed-rest weightlessness at 6 掳head-low position. Cardiac ultrasound was performed before bed rest and on the 10th and 20th day after simulated weightlessness. The apical four-chamber was obtained by QTVI.The peak velocities of left ventricular two-chamber and left ventricular long axis were measured at 6 sites of atrioventricular plane. The peak velocities of systolic wave V _ (S), early diastolic wave (V) and late diastolic wave (V) were measured. The results were analyzed by statistical software SPSS11.0.Results: there was no significant difference between simulated weightlessness and that before lying. 2 the velocity of early diastolic exercise was decreased in 3 sites of simulated weightlessness on the 10th day of simulated weightlessness and 5 sites before lying on the 20th day after simulated weightlessness.There was significant difference (P 0.05) between the 20th and 10th day of simulated weightlessness, the velocity of posterior interval motion was decreased and the velocity of late diastolic movement was decreased (P 0.05.3). On the 20th day of simulated weightlessness, the lateral site was lower than that before lying, and there was a significant difference (P 0.05) .4VeVaP / P: the 20th day of simulated weightlessness, the second day of simulated weightlessness, the second day of simulated weightlessness, the second day of simulated weightlessness.There was a significant difference between the anterior and posterior septal sites (P 0.05).Conclusion: simulated weightlessness mainly affects left ventricular diastolic function, and increases with the prolongation of simulated weightlessness, but has no effect on left ventricular systolic function.
【作者单位】：解放军第306医院特诊科;
【分类号】：R85

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