Is VF an Ablatable Rhythm?

Area of Science:

• Cardiology
• Electrophysiology
• Medical Device Technology

Background:

• Ventricular fibrillation (VF) has historically been viewed as untreatable by catheter ablation due to its disorganized nature.
• Advancements in understanding VF pathophysiology have revealed specific targets for ablation.
• Premature ventricular complexes (PVCs) triggering VF have been identified as a key target for ablation.

Purpose of the Study:

• To review the current understanding of VF pathophysiology and its implications for catheter ablation.
• To highlight recent mapping data identifying specific drivers of human VF.
• To discuss the emerging strategy of substrate and driver-targeted ablation for VF.

Main Methods:

• Review of recent mapping data identifying electrophysiological substrates and drivers of VF.
• Analysis of ablation strategies targeting PVCs and identified VF drivers.
• Evaluation of success rates and recurrence data for different ablation approaches.

Main Results:

• Ablation targeting PVCs that trigger VF demonstrates high success rates and long-term efficacy.
• Recent mapping has identified reproducible rotors, focal breakthroughs, and figure-of-eight re-entries as key VF drivers.
• These drivers are often located at myocardial scar borders, providing specific ablation targets.

Conclusions:

• Catheter ablation targeting the substrate and drivers maintaining VF represents a promising new era in treatment.
• This approach has shown encouraging results for achieving long-term freedom from VF.
• Understanding VF drivers and their reproducible behavior is crucial for successful ablation outcomes.