In vivo contact force measurements and correlation with left atrial anatomy during catheter ablation of atrial fibrillation

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
Fabienne SchluermannStefan Asbach

Abstract

Lesion formation during catheter ablation crucially depends on catheter-tissue contact. We sought to evaluate the impact of anatomical characteristics of the left atrium (LA) and the pulmonary veins (PVs) on contact force (CF) measurements. An anatomical map of the LA was obtained in 25 patients prior to catheter ablation of atrial fibrillation. Contact force (operator blinded) and local bipolar electrogram amplitudes (EGM) were measured in eight pre-defined segments around the PVs. After unblinding, points with low CF (≤5 g) were corrected to CF >5 g, and the distance between points was measured. In a pre-procedural computed tomography of the heart, LA volume as well as sizes and circumferences of the PV ostia were measured and correlated to CF measurements. Four hundred and twenty-six points in eight pre-defined LA locations were assessed. Low CF (<5 g) was found in 25.0% (43.5%) of points superior, 33.3% (66.7%) anterior, 32.1% (44.4%) inferior, and 15.5% (15.9%) posterior to the right (left) PVs. The mean distance after correction was 5.8 ± 3.4 mm. Local bipolar electrogram amplitudes between low- and high-CF points did not differ (1.21 ± 1.54 vs. 1.13 ± 1.3 mV, P = ns). The mean CF at the left PVs was significantly lower t...Continue Reading

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Citations

Mar 22, 2016·Expert Review of Cardiovascular Therapy·Jackson J Liang, Pasquale Santangeli
Jan 16, 2016·Pacing and Clinical Electrophysiology : PACE·Alonso PedroteLorena García-Riesco
Apr 14, 2016·Journal of the American Heart Association·Akio ChikataMasayuki Takamura
May 18, 2016·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Masaharu MasudaMasaaki Uematsu
Aug 12, 2016·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Stefan AsbachFabienne Schluermann
Jan 11, 2017·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Roberto De PontiJorge A Salerno-Uriarte
May 18, 2017·Expert Review of Medical Devices·Roberto RordorfVincenzo Gionti
May 19, 2019·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·So-Ryoung LeeSeil Oh

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