Objective In this study, we examine the characteristics of anteroseptal Atrial tachycardias (AT) originating from the Noncoronary Cusp (NCC) of the Aortic Valve, and demonstrate the long-term efficacy and safety of targeting the arrhythmias by Catheter Ablation.
Methods From among a cohort of 43 patients with symptomatic focal AT undergoing electrophysiological evaluation, the point of earliest activation was at NCC region in 7 patients.
Results The arrhythmia terminated with <10 seconds of radiofrequency delivery and was successfully eliminated in 7 patients. All patients have been arrhythmia free during follow-up (20±6) months.
Conclusions Catheter ablation from the base of the NCC represents a safe and effective means to eliminate focal AT.
- noncoronary cusp of the aortic valve
- atrial tachycardia