title: Incessant Palpitations and Narrow Complex Tachycardia.
abstract: Junctional tachycardia (JT) is rare cause of supraventricular tachycardia. The intracardiac activation sequence is similar to atrioventricular nodal reentrant tachycardia (AVNRT). Premature atrial contractions inserted during tachycardia can help distinguish JT from AVNRT. As noted in this case, slow pathway ablation for JT may not always be effective for termination of JT. Activation mapping during JT identified a low-amplitude potential in the region of the coronary sinus ostium and the inferior margin of the triangle of Koch that marked the successful ablation site for JT.
authors.affiliation: Section of Cardiac Electrophysiology, Division of Cardiovascular Medicine, University of Utah Health Sciences Center, 30 North 1900 East, Room 4A-100 SOM, Salt Lake City, UT 84132, USA. Electronic address: frederick.han@hsc.utah.edu.
authors.forename: Frederick T
authors.initials: FT
authors.lastname: Han
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D013611:Tachycardia, Atrioventricular Nodal Reentry; D013613:Tachycardia, Ectopic Junctional / Q000175:diagnosis / Q000503:physiopathology; D013617:Tachycardia, Supraventricular / Q000175:diagnosis / Q000503:physiopathology
keywords: AV dissociation; Junctional tachycardia; Supraventricular tachycardia