Overview
Idiopathic junctional ectopic tachycardia (JET) is a rare arrhythmia characterized by rapid heart rates originating from the atrioventricular (AV) junction, often refractory to pharmacological management 1. Catheter ablation is considered a definitive treatment option despite risks such as high-grade AV block 1.Diagnosis
Electrocardiogram (ECG) showing tachycardia originating near the AV node
Exclusion of other causes through thorough clinical evaluation and imaging
Electrophysiology study to confirm the ectopic origin and guide ablation 1Management
First-line: Antiarrhythmic drugs (specific drugs and doses not detailed in provided abstracts)
Adjunctive: Catheter ablation, particularly radiofrequency (RF) ablation, with one case using cryoablation
Acute success rate of catheter ablation is high at 100% 1Special Populations
Elderly: Study included patients with a median age of 58 years, suggesting feasibility in older adults 1
Comorbidities: No specific details on management in presence of comorbidities 1Key Recommendations
Catheter ablation, primarily using radiofrequency, is recommended for definitive treatment of idiopathic JET in adults with acute success rates approaching 100% (Evidence: Moderate) 1
Pre-ablation mapping should focus on the right atrium and aortic cusps to identify the postero-superior, posterior, or superior location of earliest activation (Evidence: Moderate) 1
High vigilance for potential high-grade AV block requiring permanent pacemaker implantation is advised post-ablation, with incidence noted at 20% in this cohort (Evidence: Moderate) 1References
1 Dar T, Turagam MK, Yarlagadda B, Parikh V, Pillarisetti J, Gopinathannair R et al.. Outcomes of junctional ectopic tachycardia ablation in adult population-a multicenter experience. Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing 2021. link