KARDIOLOGIA POLSKA, vol.74, no.1, pp.25-31, 2016 (SCI-Expanded)
Background: Although some patients with left bundle branch block (LBBB) have structural heart diseases, some patients with LBBB have "normal hearts". The electrocardiography (ECG) criteria of LBBB in reduced left ventricular ejection fraction (LVEF) have not been defined completely.