Clinical characteristics of acute inferior myocardial infarction / 中国综合临床

ABSTRACT

Objecfive To study the clinical characteristics of acute inferior myocardial infarction.Methods 100 patients with acute inferior infarction were divided into 2 groups according to coronary angiographygroup A (n=76) with right coronary artery occlusion;group B(n=24) with left circumflex artery occlusion.Results The frequencies of Electrocardiogram(ECG) ST segment elevation ST Ⅲ>ST Ⅱ and ST segment depression STAVL>STI in group A was significantly higher than that in group B(P<0.05);The frequency of ECG ST segment elevation STⅢ<STⅡ in group A wag significantly lower than that in group B(P<0.01);The frequency of ECG STV4R elevation >O.1 mV in group A was significantly higher than that in group B(P<0.05);The number of ECG with precor-dial lcads V1～6 ST segment depression >0.1 mv with lesion of left anterior descending coronary was more significant than that without precordial Vl-6 leads ST segment depression (P<0.05).Left ventricular ejection fraction (LVEF)(51%±14%) in group A was significant lower than that in group B(57%±10%)(P<0.05);The patients in group A with right ventricular infarction were more significant than those in group B(P<0.05);The total hospital mortality of patients with acute inferior myocardial infarction was 6%,and they were all in group A.But there was no significance between the two groups about cardiogenic shock,heart failure,Ⅱ degree and Ⅲ degree atrial ventricular b1ock,ventrieular tachycardia/ventrieular fibrillation and the hospital mortality.The mortality with cardiogenic shock was 83.3%.Conclusion The changes of ECG ST segment in Ⅲ,Ⅱ,Ⅰ,AVL and V4R leads can predict relatedinfarct coronary artery with acute inferior myocardial infarction.The patients with precordial Vl～6 leads ST segment depression indicates lesion of LAD.The LVEF of patients with RCA occlusion is lower than that with LCX occlusion. The primary cause of death is eardiogenic shock.