中国超声医学杂志
中國超聲醫學雜誌
중국초성의학잡지
CHINESE JOURNAL OF ULTRASOUND IN MEDICINE
2009年
11期
1028-1031
,共4页
孙欣%王浩%王志民%吴伟春%陈欧迪%肖明虎
孫訢%王浩%王誌民%吳偉春%陳歐迪%肖明虎
손흔%왕호%왕지민%오위춘%진구적%초명호
超声心动图%组织多普勒%左心室%失同步
超聲心動圖%組織多普勒%左心室%失同步
초성심동도%조직다보륵%좌심실%실동보
Echocardiography%Tissue Doppler imaging%Left ventricular%Dyssynchrony.
目的 应用组织多普勒及常规超声心动图观察左束支传导阻滞患者左心室心肌收缩运动失同步.方法 完全性左束支传导阻滞者(LBBB)20例,正常对照者20例.定量组织多普勒测量左室基底及中段共12个节段的收缩达峰时间(T_S),并计算其变异系数(标准差/均值)作为收缩不同步指数(SDI).同时测量心肌做功指数(MPI)、左室射血分数(EF)及充盈时间(FT).结果 与正常组相比,LBBB组的患者左室收缩明显延迟,12个节段T_S的均值明显延长(P<0.001).其SDI显著增大(P<0.001).LBBB组的MPI增大,EF、FT均显著减小(P<0.001).结论 LBBB患者的左室壁各节段出现不同程度的收缩延迟,对左室的整体功能存在影响.定量组织多普勒观察心室电-机械耦联情况,结合对左室整体功能的测定,可以综合评价左心室收缩的失同步.
目的 應用組織多普勒及常規超聲心動圖觀察左束支傳導阻滯患者左心室心肌收縮運動失同步.方法 完全性左束支傳導阻滯者(LBBB)20例,正常對照者20例.定量組織多普勒測量左室基底及中段共12箇節段的收縮達峰時間(T_S),併計算其變異繫數(標準差/均值)作為收縮不同步指數(SDI).同時測量心肌做功指數(MPI)、左室射血分數(EF)及充盈時間(FT).結果 與正常組相比,LBBB組的患者左室收縮明顯延遲,12箇節段T_S的均值明顯延長(P<0.001).其SDI顯著增大(P<0.001).LBBB組的MPI增大,EF、FT均顯著減小(P<0.001).結論 LBBB患者的左室壁各節段齣現不同程度的收縮延遲,對左室的整體功能存在影響.定量組織多普勒觀察心室電-機械耦聯情況,結閤對左室整體功能的測定,可以綜閤評價左心室收縮的失同步.
목적 응용조직다보륵급상규초성심동도관찰좌속지전도조체환자좌심실심기수축운동실동보.방법 완전성좌속지전도조체자(LBBB)20례,정상대조자20례.정량조직다보륵측량좌실기저급중단공12개절단적수축체봉시간(T_S),병계산기변이계수(표준차/균치)작위수축불동보지수(SDI).동시측량심기주공지수(MPI)、좌실사혈분수(EF)급충영시간(FT).결과 여정상조상비,LBBB조적환자좌실수축명현연지,12개절단T_S적균치명현연장(P<0.001).기SDI현저증대(P<0.001).LBBB조적MPI증대,EF、FT균현저감소(P<0.001).결론 LBBB환자적좌실벽각절단출현불동정도적수축연지,대좌실적정체공능존재영향.정량조직다보륵관찰심실전-궤계우련정황,결합대좌실정체공능적측정,가이종합평개좌심실수축적실동보.
Objective To evaluate the left ventricular systolic dyssynchrony in patients with left bundle branch block by tissue Doppler imaging(TDI) and standard echocardiography.Methods 20 subjects with isolated left bundle branch block(LBBB) and 20 normal controls were recruited in this study.TDI was performed using a 6-basal,6-mid left ventricular(LV) segmental model to measure the time intervals from the beginning of the QRS complex to the peak systolic velocities(T_S).The coefficient of variation(SD/mean) of 12 different TS was calculated and used as the index of systolic dyssynchrony(SDI).The myocardial performance index(MPI),LV ejection fraction(EF),and filling time(FT) were also measured.Results A significant difference was observed through T_S(P<0.001) and SDI(P<0.001) between LBBB and the normal group.Patients with LBBB had longer electromechanical delays.Compared with normal control,patients with LBBB had larger MPI,lower EF and shorter FT(all P<0.001).Conclusions In patients with LBBB,electromechanical delays were different in each segment that leads to left ventricular dyssynchrony and the depressed global LV functions.Combined with the evaluation of global LV function,TDI may be better in assessing the electromechanical uncoupling processes and left ventricular dyssynchrony.