Key result
A direction-independent high-density mapping catheter successfully identified fractionated low-voltage zones missed by a standard linear ablation catheter, enabling successful termination of complex atrial tachycardia.
Why the study?
Catheter ablation of recurrent atrial arrhythmias after pulmonary vein isolation is challenging, and wavefront directionality impacting catheter orientation can hinder accurate identification of arrhythmogenic substrate.
Does a direction-independent high-density mapping catheter improve the identification of arrhythmogenic substrate in complex atrial tachycardia following pulmonary vein isolation compared to a standard linear ablation catheter?
Case Report (n=1)
No
Does a direction-independent high-density mapping catheter improve the identification of arrhythmogenic substrate in complex atrial tachycardia following pulmonary vein isolation compared to a standard linear ablation catheter?
A direction-independent high-density mapping catheter can identify complex, fractionated signals critical for successful ablation of recurrent atrial tachycardia that may be missed by standard linear catheters.
May aid mapping of refractory complex atrial tachycardia; leaves open need for prospective validation before wider adoption.
Catheter ablation of recurrent atrial arrhythmias following pulmonary vein isolation can be challenging given the complex nature of previously ablated tissue, and managing these already complex cases may be rendered more difficult by the impact of wavefront directionality on mapping catheter orientation, which can make the accurate identification of arrhythmogenic substrate more difficult to achieve. In this report, a 72-year-old man with a history of symptomatic paroxysmal atrial fibrillation and prior pulmonary vein isolation (PVI) underwent repeat ablation. Importantly, this case study demonstrates how a direction-independent high-density mapping catheter (Advisor™ HD Grid; Abbott, Chicago, IL, USA) can identify fractionated low-voltage zones that may be missed when using a standard linear ablation catheter.
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Woo et al. (2021) conducted a case report in Recurrent atrial tachycardia post-pulmonary vein isolation (n=1). Advisor HD Grid mapping catheter vs. Standard linear ablation catheter was evaluated on Identification of fractionated low-voltage zones and termination of tachycardia. A direction-independent high-density mapping catheter successfully identified fractionated low-voltage zones missed by a standard linear ablation catheter, enabling successful termination of complex atrial tachycardia.
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