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目的:研究脉冲多普勒组织成像(pulsed-wave Doppler tissue i maging,PW-DTI)及Tei指数评价急性心肌梗死患者左心室功能的临床应用价值。方法:33例左心室射血分数(ejectionfraction,EF)正常急性心肌梗死患者(A组)、25例左心室EF减低急性心肌梗死患者(B组),30例健康体检者(C组)均行常规超声心动图、PW-DTI和Tei指数检测,比较3组Tei指数、二尖瓣环收缩期运动峰值速度(systolic velocity,Sm)、舒张早期运动峰值速度(early diastolic velocity,Em)、Em与舒张晚期运动峰值速度(late diastolic velocity,Am)比值(Em/Am)、二尖瓣口舒张早期血流峰值速度(transmitral early diastolic filling velocity,E)与Em比值(E/Em)。结果:(1)A,B组Tei指数高于C组(P<0.01),B组Tei指数高于A组(P<0.01);3组E,A,E/A比较差异无统计学意义(P>0.05);Tei指数与EF呈负相关。(2)A,B组Sm、Em、Em/Am低于C组(P<0.01),E/Em高于C组(P<0.05,或P<0.01),B组Sm、Em、Em/Am低于A组(P<0.01),E/Em高于A组(P<0.01);Sm与EF呈正相关。结论:PW-DTI联合Tei指数评价急性心肌梗死患者左心室功能较常规超声心动图准确。
Objective: To study the clinical value of pulsed-wave Doppler tissue imaging (maD-DTI) and Tei index in assessing left ventricular function in patients with acute myocardial infarction. Methods: Thirty-three patients with acute myocardial infarction (EF), 30 patients with acute myocardial infarction (EF), 25 patients with left ventricular EF decreased acute myocardial infarction (B group) and 30 healthy subjects (C) The Tei index, systolic velocity (Sm), early diastolic velocity (Em) and Em of the three groups were compared by routine echocardiography, PW-DTI and Tei index. Late diastolic velocity (Am) ratio (Em / Am), transmitral early diastolic filling velocity (E) and Em ratio (E / Em) were measured. Results: (1) The Tei index of group A and group B was higher than that of group C (P <0.01), and the Tei index of group B was higher than that of group A (P <0.01). There was no significant difference of Ei, A and E / A (P> 0.05). Tei index was negatively correlated with EF. (2) The levels of Sm, Em, Em / Am in group A and B were lower than those in group C (P <0.01) Am was lower than A group (P <0.01), E / Em was higher than A group (P <0.01), Sm was positively correlated with EF. Conclusion: PW-DTI combined with Tei index in patients with acute myocardial infarction assessment of left ventricular function than conventional echocardiography accuracy.