CAJ | 학술논문

目的探讨二维超声心动图斑点追踪成像(STI)技术精确评价犬不同形式心肌收缩运动的意义及价值.方法分离结扎11只健康杂种犬冠状动脉左前降支,造成犬急性心肌梗死,于梗死前后分别行超声心动图STI检查,应用观察实验犬急性心肌梗死前后左心室短轴径向应变(RS)、圆周应变(CS)及心尖长轴纵向应变(LS)的变化.结果正常状态下左心室心肌各节段RS、CS差异无统计学意义(P>0.05),心肌CS高于LS(P<0.05),心尖位左心室心肌LS在基底段、中间段、心尖段依次递增,基底段最小,心尖段最大(P<0.05),心肌梗死后左心室中间段前壁、前间隔及心尖段前壁、前间壁和后间隔RS、CS及LS均明显低于梗死前(P<0.05).结论 STI可精确评价犬心肌不同形式的运动产生的应变.
목적 탐토이유초성심동도반점추종성상(STI)기술정학평개견불동형식심기수축운동적의의급개치.방법 분리결찰11지건강잡충견관상동맥좌전강지,조성견급성심기경사,우경사전후분별행초성심동도STI검사,응용관찰실험견급성심기경사전후좌심실단축경향응변(RS)、원주응변(CS)급심첨장축종향응변(LS)적변화.결과 정상상태하좌심실심기각절단RS、CS차이무통계학의의(P>0.05),심기CS고우LS(P<0.05),심첨위좌심실심기LS재기저단、중간단、심첨단의차체증,기저단최소,심첨단최대(P<0.05),심기경사후좌심실중간단전벽、전간격급심첨단전벽、전간벽화후간격RS、CS급LS균명현저우경사전(P<0.05).결론 STI가정학평개견심기불동형식적운동산생적응변.
Objective To discuss the significance and value of speckle tracking imaging (STI) technique for accurate evaluating different types myocardial systole. Methods Anterior interventricular branches of 11 healthy crossbreed dogs were separated and ligatured to establish acute myocardial infarction models. The short axle radial strain (RS), circumferential strain (CS) of ventricular sinister and long axle longitudinal (LS) of apex of experiment dogs were measured with STI technique before and after myocardial infarction. Results Before myocardial infarction, no statistical difference of RS, CS was detected among sections of left ventricle (P>0.05), and RS was greater than LS (P<0.05). When detector was at the apex of base, LS of middle, apex sections of left ventricle myocardium increased gradually (LS of base section was least and apex section was most) (P<0.05). RS, CS and LS of antetheca, forepart of interventricular septum of middle of left ventricle and antetheca, posterior and forepart septum of apex all became lower after myocardial infarction (P<0.05). Conclusion Strains caused by all types of myocardium action can be accurately evaluated with STI.