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Pulsed-Electrical Field Ablation Completes Pulsed-Field Ablation-Lessons Learned on Tissue Proximity Indication in
Malte Kranert1, Christian Scheckenbach2, Tobias Harm1
1Department of Cardiology and Angiology, University Hospital of Tuebingen, Tuebingen, Germany.
Journal of Cardiovascular Electrophysiology
|July 25, 2025
Summary
Pulsed-field ablation (PFA) for atrial fibrillation (AF) requires careful attention to tissue proximity. Insufficient contact during PFA can lead to vein reconnection, necessitating repeat procedures.
Area of Science:
- Electrophysiology
- Cardiovascular interventions
Background:
- Pulmonary vein isolation (PVI) is a primary treatment for atrial fibrillation (AF).
- Nonthermal pulsed-field ablation (PFA) is an emerging technology for PVI.
- Understanding PFA's learning curve is crucial for effective application.
Observation:
- A patient undergoing PFA for paroxysmal AF experienced recurrence due to vein reconnection.
- Revisiting the ablation map indicated insufficient tissue proximity during the initial PFA procedure.
- This likely resulted in reversible electroporation and subsequent reconnection of pulmonary veins.
Findings:
- Repeat ablation using PFA with a linear catheter successfully addressed the reconnections.
- Tissue proximity indication (TPI)-based contact filtering is vital for achieving transmural lesions with PFA.
- Ensuring irreversible electroporation through adequate contact is key for durable PVI.
Implications:
- Optimizing TPI-based contact filtering in PFA may improve procedural success rates.
- This technique could enhance the long-term durability of PVI in AF patients.
- Further research into PFA parameters is warranted to refine clinical application.
