Analysis of a novel expanded tip wire (ETW) antenna for microwave ablation of cardiac arrhythmias

Heng Mao Chiu; Ananda Sanagavarapu Mohan; Andrew R. Weily; Duncan J R Guy; David L. Ross

doi:10.1109/TBME.2003.813541

Analysis of a novel expanded tip wire (ETW) antenna for microwave ablation of cardiac arrhythmias

Heng Mao Chiu^*, Ananda Sanagavarapu Mohan, Andrew R. Weily, Duncan J R Guy, David L. Ross

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

A novel expanded tip wire (ETW) catheter antenna is proposed for microwave ablation for the treatment of atrial fibrillation (AF). The antenna is designed as an integral part of coaxial cable so that it can be inserted via a 6F catheter. A numerical model based on the rotationally symmetric finite-difference time-domain technique incorporating the generalized perfectly matched layer as the absorbing boundary condition has been utilized to accurately model the interaction between the antenna and the myocardium. Numerical and in-vitro experimental results are presented for specific absorption rate, return loss and heating pattern produced by the antenna. Both numerical modeling and in-vitro experimentation show that the proposed ETW antenna produces a well-defined electric field distribution that provides continuous long and linear lesions for the treatment of AF.

Original language	English
Pages (from-to)	890-899
Number of pages	10
Journal	IEEE Transactions on Biomedical Engineering
Volume	50
Issue number	7
DOIs	https://doi.org/10.1109/TBME.2003.813541
Publication status	Published - 2003

Keywords

Atrial fibrillation
Cardiac ablation
Catheter ablation
Finite-difference time-domain
Microwave ablation
Microwave antenna
Specific absorption rate

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10.1109/TBME.2003.813541

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title = "Analysis of a novel expanded tip wire (ETW) antenna for microwave ablation of cardiac arrhythmias",

abstract = "A novel expanded tip wire (ETW) catheter antenna is proposed for microwave ablation for the treatment of atrial fibrillation (AF). The antenna is designed as an integral part of coaxial cable so that it can be inserted via a 6F catheter. A numerical model based on the rotationally symmetric finite-difference time-domain technique incorporating the generalized perfectly matched layer as the absorbing boundary condition has been utilized to accurately model the interaction between the antenna and the myocardium. Numerical and in-vitro experimental results are presented for specific absorption rate, return loss and heating pattern produced by the antenna. Both numerical modeling and in-vitro experimentation show that the proposed ETW antenna produces a well-defined electric field distribution that provides continuous long and linear lesions for the treatment of AF.",

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Analysis of a novel expanded tip wire (ETW) antenna for microwave ablation of cardiac arrhythmias

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