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Objective To explore the infarct sites in patients with inferior wall acute myocardial infarction(AMI) concomitant with ST segment elevation in leads V1-V3 and leads V3R-V5R.Methods Five patients diagnosed as inferior,right ventricular,and anteroseptal walls AMI at admission were enrolled.Electrocardiographic data and results of isotope 99mTc-methoxyisobutylisonitrile(MIBI) myocardial perfusion imaging and coronary angiography(CAG) were analyzed.Results Electrocardiogram showed that ST segment significantly elevated in standard leads II,III,aVF,and leads V1-V3,V3R-V5R in all five patients.The magnitude of ST segment elevation was maximal in lead V1 and decreased gradually from lead V1 to V3 and from lead V1 to V3R-V5R.There was isotope 99mTc-MIBI myocardial perfusion imaging defect in inferior and basal inferior-septal walls.CAG showed that right coronary artery was infarct-related artery.Conclusions The diagnostic criteria for basal inferior-septal wall AMI can be formulated as follows:(1) ST segment elevates≥2 mm in lead V1 in the clinical setting of inferior wall AMI;(2) the magnitude of ST segment elevation is the tallest in lead V1 and decreases gradually from lead V1 to V3 and from lead V1 to V3R-V5R.With two conditions above,the basal inferior-septal wall AMI should be diagnosed.
Objective To explore the infarct sites in patients with inferior wall acute myocardial infarction (AMI) concomitant with ST segment elevation in leads V1-V3 and leads V3R-V5R. Methods Five patients diagnosed as inferior, right ventricular, and anteroseptal walls AMI at admission were Results of Electrocardiogram showed that ST segment significantly elevated in standard leads II, III, aVF, and leads V1-V3, V3R V5R in all five patients. The magnitude of ST segment elevation was maximal in lead V1 and gradually gradually from lead V1 to V3 and from lead V1 to V3R-V5R.There was isotope 99mTc-MIBI myocardial perfusion imaging defect in inferior and basal inferior -septal walls.CAG showed that right coronary artery was infarct-related artery. Conclusions The diagnostic criteria for basal inferior-septal wall AMI can be formulated as follow s: (1) ST segment elevates ≧ 2 mm in lead V1 in the clinical setting of inferior wall AMI; (2) the magnitude of ST segment elevation is the tallest in lead V1 and gradually gradually increases from lead V1 to V3 and from lead V1 to V3R-V5R.With two conditions above, the basal inferior-septal wall AMI should be diagnosed.