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Contact force guided radiofrequency current application at developing myocardium.

David Backhoff1, Matthias J Müller1, Teresa Betz1

  • 1Department of Pediatric Cardiology and Intensive Care Medicine, Georg August University Medical Center, Göttingen, Germany.

Journal of Cardiovascular Electrophysiology
|May 16, 2022
PubMed
Summary
This summary is machine-generated.

Contact force monitoring during radiofrequency catheter ablation (RFA) did not significantly impact lesion size in piglets. Low contact force (CF) may be sufficient for RFA in young children, warranting further study.

Keywords:
catheter ablationchildrencontact force

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Area of Science:

  • Cardiology
  • Medical Devices
  • Surgical Procedures

Background:

  • Catheter contact force (CF) is crucial for lesion size in radiofrequency catheter ablation (RFA).
  • CF monitoring improves RFA efficacy in adults and experimental settings.
  • Coronary artery narrowing post-RFA may depend on catheter contact, but its relation to CF needs study.

Purpose of the Study:

  • To evaluate the impact of high versus low CF during RFA in piglets.
  • To assess lesion size and potential coronary artery involvement.
  • To mimic RFA in small children and inform clinical practice.

Main Methods:

  • 24 piglets underwent RFA with continuous CF monitoring using a 7F TactiCath Quartz catheter.
  • Lesions were induced with low (10-20g) or high (40-60g) CF.
  • Coronary angiography was performed pre- and post-RFA, with hearts explanted after 48h or 6 months for lesion analysis.

Main Results:

  • 148 RF lesions were analyzed; CF did not impact lesion size or mural extension, except at the AV annulus after 6 months with high CF.
  • Lesion size index and force time integral were not related to lesion size.
  • Coronary artery damage occurred in 3 piglets and was independent of CF.

Conclusions:

  • Piglet RFA lesion size was not significantly related to catheter CF.
  • Transmural lesion extension involving coronary arteries was frequent, irrespective of CF.
  • Low CF (10-20g) may be adequate for RFA in infants and toddlers; further research on CF monitoring in pediatric RFA is needed.