Key result
RF ablation lesion size depends on myocardial temperature driven by current, impedance, duration, and thermoconduction.
Why the study?
Factors influencing current, electrode impedance, ablation duration, or tissue thermoconductive properties can be altered to affect radiofrequency ablation lesion size and optimise arrhythmia treatment.
Understanding the biophysics of radiofrequency ablation allows operators to manipulate parameters like power, contact force, and irrigation to optimize lesion size and improve arrhythmia treatment outcomes.
Guides titration of current, impedance, and duration during RF ablation; leaves open real-time thermoconductivity assessment in clinical cohorts.
Radiofrequency ablation is the mainstay of interventional electrophysiology. The biophysics of radiofrequency ablation involve converting electrical energy into heat to irreversibly damage an area of myocardium. To create an ablation lesion, a temperature of >50°C must be generated in the tissue for 60 seconds. This is influenced by factors affecting either the current delivered, electrode impedance, ablation duration or the thermoconductive properties of the tissue. These factors can be altered to affect ablation lesion size to optimise arrhythmia treatment.
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Bates et al. (2026) conducted a review in Arrhythmia. Radiofrequency ablation was evaluated. Radiofrequency ablation lesion size depends on the temperature generated in the myocardium, which is determined by current supplied, impedance, ablation duration, and thermoconductive properties.
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