ArticleJournal of arrhythmia2025
The "16-gram window" of contact-force: A new criterion for very high-power short-duration ablation.
Article in Journal of arrhythmia, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- The "16-gram window" of contact-force: A new criterion for very high-power short-duration ablation.Journal of arrhythmia · 2025Article
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10 authors.
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Abstract
Background: Very high-power short-duration (vHPSD) ablation with the novel QDOT™ catheter allows the regulation of target temperature by automatically adjusting flow and power during a 4 s application of 90 W. However, the optimal contact force for sufficient lesion creation is unknown. Methods: We enrolled 73 patients with symptomatic atrial fibrillation undergoing pulmonary vein isolation (PVI) using the QDOT catheter in the vHPSD mode (90 W, 4 s). Ablation metrics associated with suboptimal applications, defined as either an impedance drop of ≤5% or a cumulative temperature-limited energy ≤330 J, were collected and analyzed. Results: A total of 3881 vHPSD applications (53.2 applications per patient) with a mean contact force (CF) of 12.8 ± 6.6 g were analyzed. Significant CF variability and intermittent loss of contact were documented in 18.2% and 8.8% of the applications, respectively. A ΔImp ≤ 5% occurred in 3.9% of vHPSD applications, while a cumulative energy ≤ 330 J was observed in 3% of the applications. Applications with a mean CF < 6 g and >22 g were associated with an inadequate impedance drop (10.3%, Phi coefficient 0.118, Conclusion: A lower but also a higher mean contact-force was associated with suboptimal vHPSD applications. Hence, a "16-gram window" of contact-force, from 6 to 22 g, could optimize energy application in vHPSD ablation.
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