Arrhythmias & electrophysiology
Reappraisal and New Observations on Idiopathic Ventricular Arrhythmias Ablated From the Noncoronary Aortic Sinus
Authors' conclusion
NCS-VA presents a peculiar electrocardiogram. A discrete potential can be mapped within the NCS during VA and sinus rhythm, and can be used in guiding ablation.
Study context
- Population
- Patients undergoing radiofrequency (RF) catheter ablation for idiopathic ventricular arrhythmias from the noncoronary aortic sinus (noncoronary sinus (NCS))
- Participants
- 11 patients
- Outcome
- Acute ablation success of idiopathic NCS-VA (RF ablation within the NCS)
Methodological detailsAngiography performed to confirm origin in the aortic sinus before RF ablation
- Angiography performed to confirm origin in the aortic sinus before RF ablation
Main finding
As reported in the abstract
- All ventricular arrhythmias (VAs) successfully ablated within the NCS with 1 RF application
- <2.5 seconds
- Successful ablation site at the nadir of NCS
- 10 patients
- Successful ablation site near the junction of NCS and right coronary sinus
- 1 patient
- Earliest ventricular activation (EVA) in NCS preceded activation at His Bundle region
- 12.1 ± 7.9 milliseconds
- Discrete potential at EVA site within NCS
- 10 patients (91%)
- Excellent pace mapping at EVA site
- 2 patients
- Junctional beats during RF application
- 0
Observational data: associations, not effects.
Safety
Complications or clinical recurrence · mean follow-up 26.0 ± 9.8 months
- No complications or clinical recurrence
Original publication
Reappraisal and New Observations on Idiopathic Ventricular Arrhythmias Ablated From the Noncoronary Aortic Sinus. JACC Clin Electrophysiol. Published 22 March 2023. doi:10.
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