title: ECG phenomena: alternating QRS morphologies.
authors.affiliation: Department for Pediatric Cardiology, University of Leipzig-Heart Center, , Leipzig, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Paech
authors.forename: Nicole
authors.initials: N
authors.lastname: Pfeil
authors.forename: Roman Antonin
authors.initials: RA
authors.lastname: Gebauer
mesh_terms: D001283:Atrioventricular Node / Q000033:anatomy & histology / Q000502:physiology*; D004562:Electrocardiography; D006801:Humans; D007231:Infant, Newborn; D008297:Male