Diagnostic value of ST-segment elevation in lead aVR exceeding V1 for identifying significant left main coronary artery disease in acute coronary syndrome.
BACKGROUND Left main coronary artery (LMCA) disease carries high morbidity and mortality and requires early identification. Although ST-segment elevation in lead aVR has been associated with severe coronary artery disease, its diagnostic value relative to lead V1 remains unclear. METHODS This cross-sectional study in...