ARQUIVOS BRASILEIROS DE CARDIOLOGIA, cilt.109, sa.3, ss.213-220, 2017 (SCI-Expanded)
Background: QRS fragmentation (fQRS) is classically defined as the presence of slurred QRS morphology in at least two contiguous leads, and its prognostic importance has been shown in ST elevation myocardial infarction (STEMI). However, no study has investigated the significance of single lead fQRS (sl-fQRS) in surface electrocardiography (ECG).