title: A four year old with a slow heart rate.
authors.affiliation: Division of Pediatric Cardiology, New York Medical College, Valhalla 10595.
authors.forename: P K
authors.initials: PK
authors.lastname: Woolf
mesh_terms: D002675:Child, Preschool; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D006339:Heart Rate; D006801:Humans; D008297:Male