title: [A first-degree heart block existed before anaesthesia and was only discovered after...].
authors.forename: C
authors.initials: C
authors.lastname: Leclerc
mesh_terms: D000293:Adolescent; D000758:Anesthesia; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis*; D006801:Humans; D008297:Male