Averaging real-time impedance enhances the prediction of steam pop risk and lesion characteristics.

ABSTRACT:

Aims

A novel impedance filtering function that averages impedance values was developed to mitigate cardiac and respiratory oscillations. We aimed to evaluate the clinical significance of averaging real-time impedance in predicting steam pops (SPs) and lesion characteristics.

Methods and results

Radiofrequency (RF) ablation was performed in 20 swine using a flexible-tip temperature-controlled power regulation catheter. Both unfiltered and filtered (averaged) impedance values were recorded using the EnSite™ X system. For each RF application, absolute (ΔImp-drop) and relative (%Imp-drop) impedance drops were quantified. Associations between impedance parameters and SP occurrence, atrial lesion transmurality, and ventricular lesion dimensions were evaluated. Among 959 lesions, S

SUBMITTER: Iwakawa H 

PROVIDER: S-EPMC12715312 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature