【摘要】 目的采用脉冲多普勒组织成像技术(PW-DTI)评价急性心肌梗死(AMI)右室壁运动和左右室运动协调性的改变。方法首次AMI患者43例(前壁组23例,下壁组20例),于发病1周时行PW-DTI检测。测定三尖瓣外环Vs、Ve、Va;主、肺动脉电机械时间Q-Ao,Q-pul及IMD;二、三尖瓣外环电机械时间mQ-so,tQ-so及ΔQ-so。对照组19例行同样检测。结果前壁、下壁组三尖瓣外环Vs较对照组降低(P分别<0.05和0.01),下壁组三尖瓣外环Q-so较对照组与前壁组延长(P<0.05),下壁组ΔQ-so较对照组和前壁组减小(P<0.05和0.01)。结论前壁、下壁心肌梗死均可致右室壁运动幅度降低,且可致左右室运动协调性改变。更多还原

【Abstract】 Objective To quantitatively analyze the changes of right ventricular movement and interventricular synchrony parameters after acute myocardial infarction(AMI)using pulsed-wave Doppler tissue imaging(PW-DTI)Methods At one week after AMI,43 patients(anterior wall group,23 patients,inferior,20) were examinated with PW-DTI,Vs,Ve,Va were measured at the lateral tricuspid annulus.The time from the onset of QRS to the onset of aortic flow (Q-Ao) and pulmonary flow ( Q-pul) were measured.The difference between the two values were named IMD.The time from the onset of QRS to the onset of S wave at the lateral mitral annulus ( mQ-so) and tricuspid annulus (tQ-so) were measured and the difference between the two values were determined ΔQ-so.The same parameters were obtained in 19 contral subjects.Results At the lateral tricuspid annulus,the Vs of both anterior and inferior group were decreased significantly when compared with the control group(P<0.05 and <0.01 respectively),tQ-so was longer in the inferior group than in the control group and anterior group (P<0.05) and ΔQ-so in the inferior group was shorter than in the anterior group(P<0.01).Conclusions After AMI,the movement of RV wall were decreased in both the anterior and inferior groups and where the interventrucular dissynchrony was taken place.更多还原