Impact of baseline pool impedance on lesion metrics and steam pops in catheter ablation.
ablation
impedance
lesion
local impedance
steam pop
Journal
Journal of cardiovascular electrophysiology
ISSN: 1540-8167
Titre abrégé: J Cardiovasc Electrophysiol
Pays: United States
ID NLM: 9010756
Informations de publication
Date de publication:
08 2023
08 2023
Historique:
revised:
19
05
2023
received:
28
03
2023
accepted:
29
05
2023
medline:
10
8
2023
pubmed:
20
6
2023
entrez:
20
6
2023
Statut:
ppublish
Résumé
Little is known about the impact of blood-pool local impedance (LI) on lesion characteristics and the incidence of steam pops. Radiofrequency applications at a range of powers (30, 40, and 50 W), contact forces (CF) (5, 15, and 25 g), and durations (15, 30, 45, and 120 s) using perpendicular/parallel catheter orientation were performed in 40 excised porcine preparations, using a catheter capable of monitoring LI (StablePoint©, Boston Scientific). To simulate the variability in blood-pool impedance, the saline-pool LI was modulated by calibrating saline concentrations. Lesion characteristics were compared under three values of saline-pool LI: 120, 160, and 200 Ω. Of 648 lesions created, steam pops occurred in 175 (27.0%). When power, CF, time, and catheter orientation were adjusted, ablation at a saline-pool impedance of 160 or 200 Ω more than doubled the risk of steam pops compared with a saline-pool impedance of 120 Ω (Odds ratio = 2.31; p = .0002). Lesions in a saline-pool impedance of 120 Ω were significantly larger in surface area (50 [38-62], 45 [34-56], and 41 [34-60] mm In an experimental model, baseline saline-pool impedance significantly affects the lesion metrics and the risk of steam pops.
Substances chimiques
Steam
0
Saline Solution
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1671-1680Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2023 Wiley Periodicals LLC.
Références
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