摘要
目的探讨多普勒组织成像技术评价完全性右束支传导阻滞（Ｃｏｍｐｌｅｔｅｒｉｇｈｔｂｕｎｄｌｅｂｒａｎｃｈｂｌｏｃｋ，简称ＣＲＢＢＢ）除极的可靠性及精确性。方法应用ＤＴＩ速度图，加速度图观察２５例ＣＲＢＢＢ患者的心室除极起源及顺序，并与２５例正常者对照。结果①加速度图显示ＣＲＢＢＢ患者的心室除极起源位于室间隔区，与正常者无显著差异（Ｐ＞０．０５）；②胸骨旁左室长轴切面Ｍ型速度图显示ＣＲＢＢＢ患者的左室除极与正常者无显著差异（Ｐ＞０．０５），室间隔除极较左室后壁明显提早（Ｐ＜０．００５）；③心尖四腔切面脉冲频谱型速度图显示ＣＲＢＢＢ患者的右室前壁基、中部除极较正常者明显延迟（Ｐ＜０．０００５）。结论本研究表明ＤＴＩ显示的ＣＲＢＢＢ心室除极状态与心电生理研究结果相一致。ＤＴＩ可直观实时、准确无创地评估心电活动，是心电生理学研究的重要补充。
Objectives To assess the feasibility and accuracy of electrical depolarization in patients with CRBBB by Doppler tissue imaging (DTI).Methods To study the origin and sequences of ventricular depolarization using DTA mode and DTV mode along with electrocardiogram in 25 patients with CRBBB and 25 normals.Results ①the onset of ventricular depolarization in CRBBB was located in IVS area,there was no significant difference between CRBBB group and normal group ( P >0.05);②the depolarization of left ventricular in CRBBB was similar to that of normals in M DTV mode ( P >0.05),the depolarization of IVS was significantly earlier than that of LVPW ( P <0.005)(parasternal LV long axis view);③the depolarizations of basic and middle segment of RVAW in CRBBB were significantly delayed in comparison with those of normals in PD DTV mode ( P <0.0005) (apical 4 chamber view).Conclusion DTI can noninvasively、accurately evaluate the electrical activation in patients with CRBBB,It is an important complement of cardiac electrophysiology. [
出处
《中国医学影像技术》
CSCD
北大核心
1999年第1期16-18,共3页
Chinese Journal of Medical Imaging Technology
