title: Incessant Long R-P Tachycardia.
abstract: A 13-year-old boy had a positive P wave in V1 with a negative P wave in lead I, aVL, and aVR, as well as a positive P wave in the inferior leads, which correlated with a left atrial appendage (LAA) atrial tachycardia (AT) focus. P-wave morphologies can provide clues regarding an AT's origin, and this P-wave negative in lead I favored LAA AT. Careful mapping along the atria and coronary sinus to determine the earliest site of activation for the surface P wave is a reliable method for precisely localizing the AT origin as a target for catheter ablation.
authors.affiliation: Cardiac Electrophysiology Section, Cardiology Division, American University of Beirut Medical Center, Beirut, Lebanon; Cardiac Electrophysiology Section, Cardiology Division, Department of Internal Medicine, American University of Beirut Faculty of Medicine and Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon.
authors.forename: Bernard
authors.initials: B
authors.lastname: Abi-Saleh
authors.affiliation: Cardiac Electrophysiology Section, Cardiology Division, American University of Beirut Medical Center, Beirut, Lebanon; Cardiac Electrophysiology Section, Cardiology Division, Department of Internal Medicine, American University of Beirut Faculty of Medicine and Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon; Department of Biochemistry and Molecular Genetics, American University of Beirut Faculty of Medicine and Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon. Electronic address: mr48@aub.edu.lb.
authors.forename: Marwan M
authors.initials: MM
authors.lastname: Refaat
authors.affiliation: Department of Pediatrics and Adolescent Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Fadi F
authors.initials: FF
authors.lastname: Bitar
authors.affiliation: Cardiac Electrophysiology Section, Cardiology Division, American University of Beirut Medical Center, Beirut, Lebanon; Cardiac Electrophysiology Section, Cardiology Division, Department of Internal Medicine, American University of Beirut Faculty of Medicine and Medical Center, PO Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon.
authors.forename: Maurice
authors.initials: M
authors.lastname: Khoury
authors.affiliation: Department of Pediatrics and Adolescent Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Mariam
authors.initials: M
authors.lastname: Arabi
mesh_terms: D000293:Adolescent; D001064:Appendicitis / Q000150:complications; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology
keywords: Atrial tachycardia; Catheter ablation; Left atrial appendage