[Catheter ablation of focus triggering ventricular fibrillation in patients with structural heart disease]

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Ventricular fibrillation (VF) can be triggered by ectopic activity, particularly in patients with structural heart disease.
• Historically, management focused on electrical instability, but identifying and ablating the trigger focus is crucial.
• The conducting system of the heart chambers is a primary source of these triggering extrasystoles.

Purpose of the Study:

• To review the current knowledge on catheter ablation for treating ventricular fibrillation triggered by foci in patients with structural heart disease.
• To highlight the efficacy and life-saving potential of urgent catheter ablation in managing electrical instability.

Main Methods:

• Literature review of case reports and studies on catheter ablation for ventricular fibrillation.
• Analysis of the origin of ectopic activity in patients with and without structural heart disease.
• Evaluation of the role of catheter ablation in removing trigger foci.

Main Results:

• Catheter ablation has been effective in managing ventricular fibrillation triggered by ectopic beats in idiopathic VF and post-myocardial infarction patients.
• Foci triggering VF are predominantly located within the cardiac conducting system.
• Ablation of these trigger foci is often a life-saving intervention, especially in cases of structural heart disease.

Conclusions:

• Catheter ablation is a critical and often life-saving treatment for ventricular fibrillation originating from specific foci.
• Targeting the conducting system for ablation is key to managing electrical instability in structural heart disease.
• This review consolidates current understanding of ablation strategies for VF in structural heart disease.