title: Role of intraventricular conduction disturbances in ventricular premature systoles.
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000453:epidemiology / Q000503:physiopathology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000502:physiology / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans