Successful ablation of a concealed parahisian accessory pathway using a remote magnetic navigation system following failure by conventional methods.

OBJECTIVE: Using conventional catheters, ablation of concealed parahisian accessory pathways may be difficult and high risk for heart block. METHODS AND
RESULTS: We describe the case of a concealed parahisian accessory pathway with three prior attempts to ablate using conventional methods (RF and cryotherapy). Using a remote magnetic navigation system, successful ablation occurred following a single RF lesion (total fluoroscopy time 17 min). In contrast to previous attempts, the patient remained asymptomatic during follow-up (12 months).
CONCLUSIONS: This is the first report of successful remote magnetic catheter ablation of a concealed parahisian AP. Magnetic catheter stability during RF application likely contributed to the success of this procedure and may have minimized the risk of AV block.