特发性室性期前收缩患者心肌运动速度的变化及意义  

Myocardial Motion Velocity Detected by Tissue Doppler Imaging for Idiopathic Premature Ventricular Beat

作　　者：孙慧[1] 薛明华[2] 王星[2] 高梅[1] 王奖荣[1] 王磌[3] 侯应龙[1] 

机构地区：[1]山东大学附属千佛山医院心内科,山东省济南市250014 [2]山东省交通医院超声科 [3]山东省交通医院心内科

出　　处：《中国循环杂志》2009年第3期198-201,共4页Chinese Circulation Journal

摘　　要：目的:应用组织多普勒成像(TDI)技术研究特发性室性期前收缩(PVB)患者心肌运动速度的变化。方法:研究对象为30例特发性PVB患者(期前收缩组)及30例健康受试者(对照组)。应用组织多普勒成像技术测量心肌组织运动速度及时间速度积分指标以反映PVB对心脏舒缩功能的影响。结果:对照组与期前收缩组正常窦性搏动时各取样点心肌组织运动速度及时间速度积分指标的比较:在所有位点,期前收缩组正常窦性搏动时的各项指标与对照组比较,差异均无统计学意义(P均>0.05)。与正常窦性搏动比较,在所有位点PVB时的收缩期峰值速度、收缩期时间速度积分、舒张早期峰值速度、舒张早期晚期峰值速度比值均显著下降(P均<0.01),差异有统计学意义,而PVB后第一个窦性搏动的收缩期峰值速度、收缩期时间速度积分和舒张早期峰值速度在各位点均较正常窦性搏动时显著增加(P均<0.01),差异有统计学意义;舒张晚期峰值速度在各位点的不同心动周期中差异均无统计学意义(P均>0.05)。结论:PVB及其代偿间期可显著影响心室的收缩及舒张功能。Objective： To detect the systolic and diastolic velocity in patients with idiopathic premature ventricular beat（PVB） by pulsed wave-tissue Doppler imaging （PW-TDI） techniques. Methods ： There were two groups involved in this study. PVB group,n = 30,patients with idiopathic PVB, and Control group, n = 30 ,of healthy subjects. The changes of cardiac function were measured and compared between two groups by the index of myocardial motion velocity using PW-TDI techniques. Results： A total of 7 sites were studied, there were no significant differences in systolic peak velocities （Sm）, time velocity integral （TVI）, peak velocity of the early relaxation wave （Em）, peak velocity of the later relaxation wave （Am） and Em/Am ratio （Era/Am） between the Control group and PVB group in the normal sinus beat （P 〉 0.05 ）. Compared with the normal sinus beat,Sm,TVI,Em and Em/Am were significantly lower in PVB （P 〈0. 01 ） ,while Sm,TVI,Em in the post-PVB sinus beat were significantly higher than that in normal sinus beat （P 〈 0.01 ）. However, there were no significant differences of Am in each site among the normal sinus beat,PVB and the post-PVB sinus beat. Conclusion： PVB and PVB-induced compensational interval could significantly influence the systolic and diastolic function of the ventricle.

关 键 词：室性期前收缩 心肌运动速度 组织多普勒成像 

分 类 号：R541[医药卫生—心血管疾病]