Key result
Catheter ablation effectively targets Purkinje-related and microstructural phenotypes in idiopathic ventricular fibrillation.
Why the study?
Idiopathic VF is a complex clinical entity characterised by an evolving scope over time, where arrhythmogenic cardiomyopathy and electrical diseases represent a significant proportion of diagnoses attributed during follow-up.
A comprehensive stepwise diagnostic workup, including genetic testing and provocative challenges, is crucial for idiopathic VF to identify underlying structural or electrical diseases and target specific therapies like ablation.
Supports phenotype-specific ablation in idiopathic VF; leaves open need for prospective validation before practice change.
Idiopathic VF is a complex clinical entity that is characterised by an evolving scope over time. Arrhythmogenic cardiomyopathy and electrical diseases represent a significant proportion of diagnoses attributed during follow-up in patients with an initial diagnosis of idiopathic VF. Stepwise diagnostic workup and management are of paramount importance. We proposed that idiopathic VF can be split into two distinct phenotypes, with potential overlap in an individual patient. In patients with Purkinje-related idiopathic VF, short-coupled ventricular ectopy can be documented, and ablation of the culprit tissue is a reasonable strategy to avoid recurrence. In patients with microstructural idiopathic VF, localised myocardial alterations can be unveiled by thorough electro-anatomical mapping and are amenable to a substrate-elimination strategy. Idiopathic VF is also a dynamic and evolving field, with promising research, new diagnostic tools and ablation techniques being developed in the near future.
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Arnaud et al. (2025) conducted a review in Idiopathic Ventricular Fibrillation. Diagnostic and therapeutic strategies (ICD and catheter ablation) was evaluated. Idiopathic ventricular fibrillation is an evolving clinical entity that can be categorized into Purkinje-related and microstructural phenotypes, both of which are amenable to targeted catheter ablation.
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