Key result
Local impedance technology shows potential to tailor RF ablation for arrhythmias distinctly from established metrics.
Why the study?
Despite advances in three-dimensional mapping and contact-force sensing technologies in radiofrequency catheter ablation, challenges remain in achieving procedural success.
Does local impedance technology improve the optimization of radiofrequency lesion delivery compared to established surrogate markers?
Does local impedance technology improve the optimization of radiofrequency lesion delivery compared to established surrogate markers?
Local impedance represents a promising novel metric for optimizing radiofrequency lesion formation and assessing myocardial substrate during catheter ablation.
May aid lesion titration in arrhythmia ablation; leaves open superiority to established metrics pending prospective trials.
INTRODUCTION: Radiofrequency catheter ablation is a cornerstone of treatment for many cardiac arrhythmias. Progression in three-dimensional mapping and contact-force sensing technologies have improved our capability to achieve success, but challenges still remain. METHODS: In this article, we discuss the importance of overall circuit impedance in radiofrequency lesion formation. This is followed by a review of the literature regarding recently developed "local impedance" technology and its current and future potential applications and limitations, in the context of established surrogate markers currently used to infer effective ablation. RESULTS: We discuss the role of local impedance in assessing myocardial substrate, as well as its role in clinical studies of ablation. We also discuss safety considerations, limitations and ongoing research. CONCLUSION: Local impedance is a novel tool which has the potential to tailor ablation in a manner distinct from other established metrics.
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Chu et al. (2021) conducted a review in Cardiac arrhythmias. Local impedance technology during radiofrequency catheter ablation was evaluated. Local impedance technology is a novel tool that has the potential to tailor radiofrequency catheter ablation for cardiac arrhythmias distinctly from other established metrics.
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