Arrhythmias & electrophysiology
Contact Force Increases During Radiofrequency Ablation: A Novel Catheter Assessment of Myocardial Response to Thermal Injury
Authors' conclusion
Progressive CF increase during RF ablation is a distinct phenomenon that likely reflects the "push-back" effect of local myocardial swelling against the catheter tip.
Study context
- Population
- Patients undergoing radiofrequency (RF)-based pulmonary vein isolation
- Participants
- 416 RF sessions
- Comparison
- RF sessions with progressive contact force (CF) increase vs sessions with at least 1 CF decrement
- Group 1n = 241
- Group 2n = 175
- Outcome
- CF changes during RF delivery
Main finding
As reported in the abstract
Group 1
241
events
Group 2
175
events
- CF increase in 0–5 s of RF, right vs left pulmonary vein (PV) sites (greatest increase; no difference)
- 2.2 ± 2.2 g vs 1.9 ± 2.3 g, P = 0.26
- CF increase at 20–25 s, right vs left PV sites
- 1.2 ± 1.3 g vs 0.5 ± 0.3 g, P = 0.01
- CF increment, posterior vs anterior PV sites
- 3.4 ± 3.1 g vs 1.4 ± 1.4 g, P < 0.001
Original publication
Contact Force Increases During Radiofrequency Ablation: A Novel Catheter Assessment of Myocardial Response to Thermal Injury. JACC Clin Electrophysiol. Published 4 December 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →