Key result
Low power-moderate duration RF ablation caused a larger total volume of esophageal damage compared to high power-short duration settings, which exhibited significant thermal latency.
Why the study?
The study was conducted to model the evolution of peak temperature and volume of damaged esophagus during and after RF ablation comparing LPMD, HPSD, and VHPVSD settings.
Does high power-short duration or very high power-very short duration RF ablation reduce the volume of esophageal injury compared to low power-moderate duration ablation in an in silico model?
Does high power-short duration or very high power-very short duration RF ablation reduce the volume of esophageal injury compared to low power-moderate duration ablation in an in silico model?
In silico modeling suggests that while low power-moderate duration RF ablation causes larger total esophageal damage, high power-short duration strategies exhibit significant thermal latency after RF termination.
Answers are grounded in this paper and cite their sources.
May favor high-power short-duration RF ablation to limit esophageal injury; leaves open translation to clinical outcomes.
Objective To model the evolution of peak temperature and volume of damaged esophagus during and after radiofrequency (RF) ablation using low power‐moderate duration (LPMD) versus high power‐short duration (HPSD) or very high power‐very short duration (VHPVSD) settings. Methods An in silico simulation model of RF ablation accounting for left atrial wall thickness, nearby organs and tissues, as well as catheter contact force. The model used the Arrhenius equation to derive a thermal damage model and estimate the volume of esophageal damage over time during and after RF application under conditions of LPMD (30 W, 20 s), HPSD (50 W, 6 s), and VHPVSD (90 W, 4 s). Results There was a close correlation between maximum peak temperature after RF application and volume of esophageal damage, with highest correlation ( R 2 = 0.97) and highest volume of esophageal injury in the LPMD group. A greater increase in peak temperature and greater relative increase in esophageal injury volume in the HPSD (240%) and VHPSD (270%) simulations occurred after RF termination. Increased endocardial to esophageal thickness was associated with a longer time to maximum peak temperature ( R 2 > 0.92), especially in the HPSD/VHPVSD simulations, and no esophageal injury was seen when the distances were >4.5 mm for LPMD or >3.5 mm for HPSD. Conclusion LPMD is associated with a larger total volume of esophageal damage due to the greater total RF energy delivery. HPSD and VHPVSD shows significant thermal latency (resulting from conductive tissue heating after RF termination), suggesting a requirement for fewer esophageal temperature cutoffs during ablation.
No takes yet. Share an insight, caveat, or question.
Pérez et al. (2021) studied Esophageal injury during radiofrequency ablation. Low power-moderate duration (LPMD) radiofrequency ablation vs. High power-short duration (HPSD) (50 W, 6 s) and very high power-very short duration (VHPVSD) (90 W, 4 s) was evaluated on Evolution of peak temperature and volume of damaged esophagus. Low power-moderate duration RF ablation caused a larger total volume of esophageal damage compared to high power-short duration settings, which exhibited significant thermal latency.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: