组织多普勒成像评价右心室心尖部及右室流出道起搏的同步性

目的采用组织多普勒成像（TDI）检测右室心尖部起搏（RVAP）、右室流出道起搏（RVOTP）对于左室同步性的影响与比较。方法 2008年3月2010年3月20例安置RVAP患者及20例安置RVOTP患者术后3个月行TDI检测,将左室12节段收缩达峰时间的标准差（TS-SD）、6个基底段收缩达峰时间差值、左室12个节段中任意两个节段收缩达峰时间最大差值作为同步化参数。结果 TDI结果显示,两组之间同步性参数比较,有统计学意义（P〈0.01）。结论 RVAP会导致左室内收缩不同步,TDI技术可以准确评价左室收缩同步性。

Synchronicity of Right Ventricular Apex Pacing and Right Ventricular Outflow Tract Evaluated by Tissue Doppler Imaging

Objective To explore the impact of right ventricular apex pacing（RVAP）and right ventricular out-flow tract pace-making（RVOTP）on left ventricular systolic synchronization（LVSS）via tissue Doppler imaging （TDI）.Methods A total of 20patients with RVAP and 20patients with RVOTP from March 2008to March 2010 were collected.TDI detection was performed on all the patients three months after the operation.Synchronizing parameters included TS-SD of 12regional contractions of left ventricle,6TS difference of basal segment,and maximum difference of TS in 12regional contractions of left ventricle.Results The results of TDI showed significant difference in synchronizing parameters between RVAP and RVOTP（P0.01）.Conclusion RVAP may lead to un-synchronization of the left systole.TDI can evaluate LVSS accurately.