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实时三维超声心动图评价右室心尖部起搏对左室收缩同步性及收缩功能的早期影响

Keywords: 超声心动描记术,实时三维,右心室心尖部起搏,同步性,心室功能

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Abstract:

目的探讨应用实时三维超声心动图(real-timethree-dimensionalechocardiography,RT-3DE)评价右室心尖部起搏(rightventricularapexpacing,RVAP)对左室收缩同步性及收缩功能的早期影响。方法30例双腔起搏器植入(均为RVAP)的患者为病例组,30例正常人为对照组,在术前及术后1周应用RT-3DE采集左心室全容积图像。应用在机Qlab8.1分析软件,获得左心室整体与16节段容积-时间曲线和比较左心室16、12、6节段自心电图QRS波起点至左心室最小收缩末容积点时间的标准差和最大时间差(即Tmsv16-SD、Tmsv12-SD、Tmsv6-SD、Tmsv16-Dif、Tmsv12-Dif、Tmsv6-Dif)作为左室收缩同步性参数;同时获得左心室舒张末期容积(1eftventricleend-diastolicvolume,LVEDV)、左心室收缩末期容积(1eftventricularendsystolicvolumes,LVESV)、每搏量(strokevolume,SV)、左心室射血分数(1eftventricularejectionfraction,LVEF)作为左室收缩功能参数。结果与对照组比较,术后1周,病例组左室收缩同步性参数明显延长(P0.05)。与术前比较,术后1周,病例组左室收缩同步性参数明显延长(P0.05)。结论RVAP早期即可导致左心室收缩不同步,且其同步性变化早于收缩功能变化。RT-3DE可客观、准确地评价左室收缩同步性及收缩功能。

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