Role of QRS fragmentation in 12-lead surface ECG in prediction of isolated epicardial coronary artery ectasia and its anatomical distribution in patients without acute coronary syndromes

摘要

Twelve-lead surface ECG recording for one of our study population showing different patterns of QRS fragmentation in inferior, anterior, and lateral leads (R’ in V , notched R wave in V , notched S wave in II and V ). This patient was discovered to have CAE in LAD, LCX, and RCA by invasive CA. A magnified view of lead V is shown with 2 positive and 2 negative waves with a normal QRS complex duration