超声心动图评价正常小儿左右心室间同步性运动

摘要

Objective To evaluate two methods of echocardiography in interventricular synchrony between LV and RV in norreal children. Methods ①Quantitative tissue velocity imaging (QTVI) was performed in 100 normal children using apical four - chamber view and two - chamber view. The time from onset of QRS complexes to peak velocity during systolee (Ts) was measured in myocardial movement curves of every segments. ②PW : The time from onset of QRS complexes to beginning times of flow velocity spectra in aortic valve(LPEP) and pulmonary valve(RPEP) and their difference(△PEP) were measured respectively. Results ①Tbe Ts of the basal segment of lateral wall in RV was about (41±16) ms later than that of LV(P<0.01).②LPEP was about (5.8±5.7) ms prolonged than RPEP(P<0.05). Conclusion In cardiac cycle, movement between LV and RV is basically synchrony in child, but there is a certain extent difference in phase because of difference in blood dynamics.%目的 探讨两种超声心动图方法评价正常小儿左右心室间同步性运动.方法 ①获取标准心尖四腔观及两腔观,应用QTVl技术描记100例正常小儿左心室各壁基底段及右心室侧壁基底段心肌的组织多普勒速度曲线,测量每一取样点心肌运动曲线上自QRS波起始至收缩期峰值速度的时限Ts.②脉冲多普勒状态下,测量QRS起点到主动脉瓣血流频谱起点时间(LPEP)、QRS起点到肺动脉瓣血流频谱起点时间(RPEP)及其差值(APEP).结果 ①右室侧壁基底段的Ts值较左室4个壁基底段的Ts均值延迟(41±16)ms(P<0.01).②主动脉射血前期较肺动脉射血前期延长(5.8±5.7)ms(P<0.05).结论 在正常小儿心动周期中,左右心室运动基本上同步,但由于血流动力学状态上的差别,而表现为时相上有一定差异性.