title: ECG quiz. Why the sudden PR prolongation?
authors.affiliation: Carolinas Medical Center Charlotte, NC 28232, USA. Laszlo.Littman@carolinashealthcare.org
authors.forename: Laszlo
authors.initials: L
authors.lastname: Littmann
authors.forename: Rehan
authors.initials: R
authors.lastname: Khan
mesh_terms: D000293:Adolescent; D054537:Atrioventricular Block / Q000175:diagnosis*; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D033162:Incidental Findings