摘要
目的 探讨超声测量同步性指数评价窄QRS波的扩张型心肌病患者心室内与心室间不同步的临床意义。方法 应用定量组织速度成像(QTVI)技术评价21例扩张型心肌病患者(DCM组)和21例正常人(对照组)的局部心肌,获得多普勒组织速度曲线,分别测量QRS波起点到射血期S波起点的时间(Q Sb),计算心室内同步性指数(TSI)和各室壁壁内的同步性指数(RSI)。结果 DCM组患者各壁Q Sb延长;TSI较对照组明显增高[ (36. 55±16. 12)msvs(18. 18±10. 62)ms, P<0. 001];左室侧壁、后壁、室间隔的RSI明显增高。结论 对窄QRS波的扩张型心肌病患者,明显存在心室内不同步,左室各壁各节段也出现不同程度的收缩延迟,因此可以考虑扩大双腔起搏治疗的临床适应证。
Objective To measure dyssynchrony indexes and observe intraventricular dyssynchrony in dilated cardiomyopathy patients with narrow QRS wave by quantitative tissue velocity imaging(QTVI) for its clinical meanings. Methods Left ventricular regional myocardium of 21 dilated cardiomyopathy patients(DCM group) and 21 normal persons(control group) was studied, left ventricular tissue Doppler velocity cures were acquired along long axis in basal, mid and apical segments of different walls, the duration from the beginning of electrocardiograph QRS wave to the beginning of S wave(Q Sb) was measured. Furthermore, total synchronicity index(TSI) of left ventricle and regional synchronicity indexes(RSI) in different walls were calculated. Results Q Sb of different walls of DCM group was prolonged more in DCM group than that of control group; total synchronicity index was significantly higher in DCM group than in control group[( 36.55 ± 16.12 )ms vs ( 18.18 ± 10.62 )ms, P< 0.001 ]; and regional synchronicity indexes in lateral, posterior and septal walls were higher in DCM group than in control group. Conclusions Dilated cardiomyopathy patients with narrow QRS have delayed contraction with different degrees at different walls of left ventricle and obvious intraventricular dyssynchrony.
出处
《中华超声影像学杂志》
CSCD
2005年第4期261-263,共3页
Chinese Journal of Ultrasonography
