Key result
Temperature-limiting ablation reduces power in ~48% of buffer cells while meeting post-pulse thermal safety endpoints.
Why the study?
Comparisons of radiofrequency cardiac ablation protocols are confounded by differences in delivered energy, thermal latency, perfusion, modeling assumptions, and temperature-controller action.
How do different power-time radiofrequency ablation protocols (30 W/30 s, 50 W/10 s, fixed 90 W/4 s, and temperature-limited 90 W/4 s) affect thermal latency, peak temperature, and lesion formation in a two-dimensional electro-thermal model?
How do different power-time radiofrequency ablation protocols (30 W/30 s, 50 W/10 s, fixed 90 W/4 s, and temperature-limited 90 W/4 s) affect thermal latency, peak temperature, and lesion formation in a two-dimensional electro-thermal model?
In a 2D electro-thermal model of radiofrequency cardiac ablation, peak-temperature and perfusion-effect orderings remained consistent across return-location tests, supporting the model's use for protocol screening rather than patient-level prediction.
Model comparisons of ablation protocols require in vivo confirmation; leaves open clinical translation of high-power short-duration lesion predictions.
Radiofrequency ablation comparisons are confounded by energy, latency, perfusion, assumptions, and controller action. An assumption-bounded two-dimensional electro-thermal model compared 30 W/30 s, 50 W/10 s, fixed 90 W/4 s, and temperature-limited 90 W/4 s protocols. A 30 s post-pulse endpoint passed 12/12 cases. Equal-energy peak temperatures differed. In the 4 mm-buffer grid, the limiter reduced power in 29/60 cells. Peak-temperature and protocol-associated perfusion-effect orderings persisted across return-location tests, whereas the presence of the Arrhenius damage contour Ω ≥ 1 and controller intervention were return-sensitive. This supports screening, not absolute or patient-level prediction.
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Zhou et al. (2026) studied Radiofrequency cardiac ablation lesion formation. Radiofrequency cardiac ablation protocols (30 W/30 s, 50 W/10 s, fixed 90 W/4 s, and temperature-limited 90 W/4 s) vs. Comparison across power-time allocation protocols in a 2D electro-thermal model was evaluated on 30 s post-pulse endpoint, peak temperatures, power reduction in 4 mm-buffer grid, and Arrhenius damage contour (Ω ≥ 1). In a 2D electro-thermal ablation model, the temperature limiter reduced power in 29/60 cells in the 4 mm-buffer grid and the 30 s post-pulse endpoint passed 12/12 cases.
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