组织多普勒同步显像技术在猪闭合性心肌挫伤早期诊断中的应用探讨

摘要

目的 探讨组织多普勒同步显像(TSI)技术在闭合性心肌挫伤早期诊断中的价值.方法 选取贵州小型巴马猪10头,采用自制小型撞击器成功建立10只猪闭合性心肌损伤的动物模型.分别在伤前及伤后0.5、2、4、8、12 h行超声心动图检查,并与病理TTC心肌染色结果 对照分析.结果 在撞伤后0.5 h即可观察到损伤节段的相应变化,显示挫伤节段主要为前壁和侧壁等.心肌挫伤后应用三种超声技术所观察的异常节段、室壁运动评分、室壁收缩期峰值速度时间评分室壁节段运动指教(WMSI)、收缩期峰值速度时间指数(TPI)均较伤前明显增加(P＜0.01).结论 2DE能够较准确地反映心肌挫伤的部位.TSI可直观、准确地分辨心肌挫伤后损伤区的边界、判断异常节段,不易混淆,其在猪心肌挫伤早期诊断中有着2DE不可比拟的优势.%Objective To study the value of two-dimensional Echocardiography(2DE)and doppler tissue synchronization imaging (TSI) during early diagnosis of close myocardial contusion.Methods 9 small Guizhou-Panama pigs were used.The close myocardial contusion animal model was successfully established by using the serf made small impactor.Echocardiography wag applied before and after injury for 0.5,2,4,8 and 12h respectively,these data were analyzed together with the TYC pathological results.Results After the strike for 0.5h,the location and area of the damage call be directly and rapidly shown by 2DE and TSI,which showed that after myocardial contusion (MC),main damaged areas are anterior and lateral myocardial walls.After myocardial contusion MC,three echocardiography techniques were used to observe the scale of the abnormal segment,the movement of the myocardial wall,Time tO Peak of Systolic Velocity and wall motion segmental inter(WMSI),Time to Peak of Systolic Velocity index(TPI),which all were increased than that pre-injury.Conclusion 2DE and TSI can be used for accurately early diagnosis of the location of myocardial contusion.TSI is more specific for the diagnosis of myocardial contusion.