Key Points
- Characterize the electrophysiological properties and catheter ablation approach for focal atrial tachycardia originating from the non-coronary aortic cusp.
- Electrophysiological evaluation was conducted with atrial pacing protocols, adenosine administration, and activation mapping of the right atrium and aortic root.
- Radiofrequency energy delivery was directed at the site of earliest activation in the non-coronary aortic cusp.
- The tachycardia showed an incessant pattern, adenosine sensitivity, and earliest right atrial activation in the para-hisian region.
- Aortic root mapping localized the earliest activation site to the non-coronary aortic cusp, where radiofrequency ablation achieved prompt termination without conduction block.
Structured PICO
PPopulationPatient with adenosine-sensitive focal atrial tachycardia originating from the non-coronary aortic cusp
IInterventionRadiofrequency ablation at the non-coronary aortic cusp
OOutcomeTermination of tachycardia
Mapping and ablation of the non-coronary aortic cusp should be considered for focal atrial tachycardias with earliest right atrial activation at the para-hisian area to avoid AV block.