Arrhythmias & electrophysiology
Right ventricular outflow tract aneurysm in arrhythmogenic right ventricular cardiomyopathy: The mechanism of ventricular tachycardia
Authors' conclusion
In patients with ARVC with RVOT aneurysms undergoing VT ablation, the aneurysm and the isthmus between the aneurysm and perivalvular fibrosis may contribute to VT circuits. Electrical homogenization of the aneurysm combined the linear ablation to the anatomic scar could be an alternative approach and may reduce VT recurrence.
Study context
- Population
- Patients with ventricular tachycardia (VT) who met the diagnostic criteria for arrhythmogenic RV cardiomyopathy (ARVC) and underwent ablationpatients with VT who met the diagnostic criteria for ARVC and underwent ablation, RV outflow tract (RVOT) aneurysms in 10
- Participants
- 106 patients
- Outcome
- RVOT aneurysms
Main finding
As reported in the abstract
Patients with RVOT aneurysms
10 patients
9.4%
Total VTs
18
Observational data: associations, not effects.
Further findings
VT morphology
- VTs with left bundle branch block (LBBB) inferior axis morphology
- All patients
- Also had LBBB intermediate axis VTs
- 5 (50%)
- LBBB superior axis VTs
- 3 (30%)
Procedures
- Epicardial-endocardial approach
- all cases
- Procedures per patient
- 2.2 ± 1.4
VTs associated with the RVOT aneurysm
- VTs associated with the aneurysm
- 15 VTs (83.3%)
Catheter ablation result
- All VTs rendered noninducible
Original publication
Right ventricular outflow tract aneurysm in arrhythmogenic right ventricular cardiomyopathy: The mechanism of ventricular tachycardia. Heart Rhythm. Published 10 July 2025. doi:10.
Summarised from the published abstract; every number is checked against it