Evaluation of Left Ventricular Systolic Function in Patients with Different Segmental Myocardial Infarction by Two-dimensional Speckle Tracking Technique
Objective To discuss the clinical value of applying two-dimensional speckle tracking imaging(2D-ST1)to evaluate left ventricular systolic function in patients with myocardial infarction of different segments.Methods A total of 86 patients with acute myocardial infarction(AMI)with single coronary artery stenosis over 75.0％confirmed by coronary angiography were selected.The parameters of left ventricular systolic function,strain and tissue mitral annular displacement(TMAD)were measured by echocardiography and compared with 34 healthy volunteers(control group).Results(1)Compared with the control group,global longitudinal systolic strain(GLS),and the mean value of tissue mitral annular displacement(mTMAD),tissue mitral annular displacement of the middle point(TMAD mid)and left ventricular longitudinal fractional shortening(TMAD mid％)decreased in anterior myocardial infarction groups(Ant-MI groups)and inferior myocardial infarction groups(Inf-MI groups).The difference was statistically significant(P＜0.05);(2)the absolute value of GLS was positively correlated with left ventricular ejection fraction(LVEF)(r=0.770,P＜0.001);TMAD parameters were positively correlated with LVEF(r=0.644,0.649,0.719,P＜0.001);TMAD parameters were positively correlated with the absolute values of GLS(r=0.508,0.510,0.539,P＜0.001);(3)among the TMAD parameters,TMAD mid％had the largest AUC(AUC(TMAD mid％)=0.919,the best cut-off value was 10.90％,the sensitivity was 96.40％,and the specificity was 75.90％.Conclusion 2D-STI technology can conveniently and accurately evaluate left ventricular systolic function in patients with myocardial infarction of different segments.
NETL
NSTL
万方数据
