Electrocardiographic Diagnosis of the Coronary Artery Culprit Site in Ischemic Heart Disease

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The diagnostic accuracy of using electrocardiographic findings to identify affected vessels in cases of myocardial infarction and angina pectoris treated by percutaneous transluminal coronary angioplasty was assessed. From the anterior wall leads, ST segment elevation in leads I and aVL showed diagnostic accuracy (sensitivity, specificity and positive predictive value) in identifying proximal lesions of the left anterior descending coronary artery of 89%, 58% and 62%, and the diagnostic accuracy of the QS wave in V1 was 62%, 83% and 72%, respectively. For the posterior wall leads, the corresponding values for the diagnosis of affected vessels based on R/S>1 in V1 for the left circumflex coronary artery were 50%, 89% and 60%, respectively. The inferior wall leads with ST segment elevation in leads II, III and aVF, and ST segment depression in aVL, showed diagnostic accuracy for the right coronary artery of 90%, 90% and 92%, respectively. Bifurcation of the first diagonal branch, dominance of the posterior descending branch, the normal subtypes of the coronary artery and the occurrence of spontaneous recanalization may have influenced the accuracy of diagnosis. Adding a high lateral wall lead one intercostal space above V4 and a posterior wall lead located one intercostal space below V6 appeared to increase the diagnostic accuracy of detecting the coronary artery lesions responsible for myocardial ischemia. (Circ J 2003; 67: 775 - 780)<br>

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  • Circulation Journal

    Circulation Journal 67 (9), 775-780, 2003

    一般社団法人 日本循環器学会

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