Estimation of left ventricular global function by Tei index in patients with acute myocardial infarction.

Objective To investigate the value of a new index - Tei index for estimating left ventricular global function in patients with acute myocardial infarction.Methods The study population included 95 patients with acute myocardial infarction.They were divided into two groups according to EF measured by echocardiography in apical four chamber view:one group with normal EF(EF≥50%,n=52)(group A),the other with abnormal EF(EF50%,n=43)(group B).The control group included 50 normal subjects.The systolic and diastolic diameters of left ventricle(LVDd·LVDs),E/A ratio(E/A)at mitral orifice,deceleration time(DT),isovolumic relaxation time(IRT),S/Dratio(S/D)of pulmonary venous flow and Tei index were measured.Results Both LVDd and LVDs were increased in group A and B compared with group C(P 0.01),LVEF was descended(P 0.01)and IVRT was delayed(P 0.01).DT in group B was shortened than that of group C(P 0.01).S/D in group A was larger than that of group C(P 0.05).Tei index in group A and group B was prolonged compared that of group C(P 0.01).Tei index in group B was prolonged compared that of group A(P 0.05).Conclusion Tei index is valuable and easy for estimating left ventricular systolic and diastolic functions with high sensitivity in patients with acute myocardial infarction.