WCSE

Computer Simulation Study on Comparing Lesion Effects of Radio Frequency Ablation for Treating Atrial Fibrillation by Multichannel Bipolar or Unipolar

Abstract— Purpose: In pulmonary veins (PVs) isolation (PVI) and left atrial (LA) roof linear ablation, radiofrequency (RF) energy is often used to create a continuous lesion or discrete lesions for blocking the accessory conduction pathways. By using transient finite element analysis, this study compared the effectiveness of multichannel bipolar ablation mode (Multi-BiM) with unipolar ablation mode (UiM) in creating a continuous lesion and lesion size in a 5-mm-thick atrial wall. Methods: Computer models of unipolar and multipolar catheter were developed to study the length of continuous lesion and the size of discrete lesion in atrial walls created through Multi-BiM and UiM. Three peak value voltage—20 V 25 V and 30 V—were considered in Multi-BiM or UiM ablation (hereafter, Multi-BiM-20V, Multi-BiM-25V, Multi-BiM-30V and UiM-30V, respectively). Results: UiM-30V failed to create continuous and transmural lesion. Multi-BiM-20V created three discrete lesions. Multi- BiM-25V generated the continuous but not transmural lesion. Multi-BiM-30V not only created transmural lesions in 5-mm-thick atrial walls but also created continuous lesion with a maximum depth and width of 6.70 mm and 23.50 mm. An additional discrete lesion or short continuous lesion was yielded through multichannel bipolar ablation method with 30V ablation voltage. Conclusion: Compared with unipolar ablation, multichannel bipolar ablation can more easily create transmural lesions, continuous lesions and larger discrete lesion size in atrial tissue for completing circumferential PVI and LA linear ablation.

Index Terms— Multichannel bipolar ablation, Radio frequency ablation, Continuous lesion, Transmural lesion, Computer model of finite element method.

Shengjie Yan, Xiaomei Wu, Weiqi Wang
Electronic Engineering Department, Fudan University, CHINA
Xiaomei Wu
Shanghai Engineering Research Center of Assistive Devices, CHINA
Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention (MICCAI) of Shanghai, Fudan University, CHINA

ISBN: 978-981-11-3671-9 DOI: 10.18178/wcse.2017.06.17Xsrc="http://www.wcse.org/uploadfile/2019/0823/20190823055609629.png" style="width: 120px; height: 68px;" />[Download]

Cite: Shengjie Yan, Xiaomei Wu, Weiqi Wang, "Computer Simulation Study on Comparing Lesion Effects of Radio Frequency Ablation for Treating Atrial Fibrillation by Multichannel Bipolar or Unipolar," Proceedings of 2017 the 7th International Workshop on Computer Science and Engineering, pp. 1379-1386, Beijing, 25-27 June, 2017.