Incessant Palpitations and Narrow Complex Tachycardia

Card Electrophysiol Clin. 2016 Mar;8(1):61-5. doi: 10.1016/j.ccep.2015.10.005. Epub 2016 Jan 8.

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.

Keywords: AV dissociation; Junctional tachycardia; Supraventricular tachycardia.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Arrhythmias, Cardiac* / diagnosis
  • Arrhythmias, Cardiac* / etiology
  • Diagnosis, Differential
  • Electrocardiography
  • Female
  • Humans
  • Middle Aged
  • Tachycardia, Atrioventricular Nodal Reentry
  • Tachycardia, Ectopic Junctional* / diagnosis
  • Tachycardia, Ectopic Junctional* / physiopathology
  • Tachycardia, Supraventricular* / diagnosis
  • Tachycardia, Supraventricular* / physiopathology