Key result
Experimental RF ablation at 160 or 200 Ω increases steam pop risk ~131% versus 120 Ω.
Why the study?
Little is known about the impact of blood-pool local impedance on lesion characteristics and the incidence of steam pops.
Does baseline saline-pool impedance affect lesion metrics and the risk of steam pops during radiofrequency ablation in an experimental model?
Population
40 excised porcine preparations (648 lesions)
Comparison
Saline-pool local impedance of 120 vs 160 vs 200 Ω
Design
Ex vivo experimental study
Authors
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Higher impedance may raise steam pop risk in models; leaves open optimal targets for clinical ablation.
Does baseline saline-pool impedance affect lesion metrics and the risk of steam pops during radiofrequency ablation in an experimental model?
Effect estimate: OR 2.31
p-value: p=0.0002
Higher baseline saline-pool impedance during radiofrequency ablation significantly alters lesion dimensions and increases the risk of steam pops in an experimental model.
Takigawa et al. (2023) studied Catheter ablation (n=40). Radiofrequency ablation at saline-pool impedance of 160 or 200 Ω vs. Saline-pool impedance of 120 Ω was evaluated on Risk of steam pops (OR 2.31, p=0.0002). In an experimental model, radiofrequency ablation at a saline-pool impedance of 160 or 200 Ω more than doubled the risk of steam pops compared with 120 Ω (OR 2.31; p=0.0002).
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