In vivo contact force analysis and correlation with tissue impedance during left atrial mapping and catheter ablation of atrial fibrillation

Circulation. Arrhythmia and Electrophysiology
Hisaki MakimotoRoland Richard Tilz

Abstract

The aim of this study was to evaluate in vivo contact force (CF) and the correlation of CF with impedance during left atrial 3-dimensional electroanatomical mapping and ablation. CF during point-by-point left atrial mapping was assessed in 30 patients undergoing atrial fibrillation ablation. Operators were blinded to the real-time CF data. Data were analyzed according to 11 predefined areas in the left atrial and 6 segments around the ipsilateral pulmonary veins. A total of 3475 mapping and 878 ablation points were analyzed. Median CF during mapping was 14.0g (6.5-26.2; q1-q3), ranging from 5.1g at the ridge to 29.8g at the roof. Median CF at the ridge and mitral isthmus were 5.1g and 6.9g, respectively. Extremely high CF ≥100g was noted in 24 points (0.7%). Median CFs during ablation around the right and left pulmonary veins were 22.8g (12.6-37.9; q1-q3) and 12.3g (6.9-30.2; q1-q3), respectively. The lowest median CFs were recorded at the anterior-superior and anterior-inferior segments of the left pulmonary veins (7.2g and 7.9g). Impedance values during mapping and impedance fall during ablation correlated with the applied CF (R(2)=0.16; P<0.001 and R(2)=0.04; P<0.001) although there was significant overlap. Excessively high ...Continue Reading

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Citations

Dec 3, 2014·International Journal of Cardiology·Takehiro KimuraKeiichi Fukuda
Aug 15, 2015·Heart Rhythm : the Official Journal of the Heart Rhythm Society·David AndreuLluís Mont
Apr 2, 2016·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·N DeubnerT Neumann
Mar 22, 2016·Expert Review of Cardiovascular Therapy·Jackson J Liang, Pasquale Santangeli
May 1, 2015·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Sven KnechtMichael Kühne
Feb 18, 2015·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Michaela Sagerer-Gerhardt, Helmut P Weber
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Aug 5, 2020·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Corrado TomasiAndrea Rubboli
Aug 12, 2016·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Stefan AsbachFabienne Schluermann
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Dec 4, 2020·Indian Pacing and Electrophysiology Journal·Rafael M RonsoniTiago Luiz Luz Leiria

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