Noncontact radio-frequency ablation for obtaining deeper lesions

Jie Zhang, Jang Zern Tsai, Hong Cao, Yi Chen, James A. Will, Vicken R. Vorperian, John G. Webster

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)


Radio-frequency (RF) cardiac catheter ablation has been very successful for treating some cardiac arrhythmias, however, the success rate for ventricular tachycardias is still not satisfactory. Some existing methods for developing deeper lesions include active cooling of the electrode and modifying the electrode shape. We propose a method of noncontact ablation, to solve this problem. We apply 120 W of power through an 8-mm electrode for a 120-s duration, with distances from 0 to 3 mm between electrode and myocardium, to create lesions in myocardium. We apply flow rates of 1, 3, and 5 L/min to determine their effect. Results show that with an optimal distance from 0.5 to 1.5 mm between electrode and myocardium, we increase lesion depth from 7.5 mm for contact ablation to 9.5 mm for noncontact ablation. For different flow rates, the optimal distance various. The effect of flow rate is not obvious. Higher flow rate does not lead to a deeper lesion.

頁(從 - 到)218-223
期刊IEEE Transactions on Biomedical Engineering
出版狀態已出版 - 1 2月 2003


深入研究「Noncontact radio-frequency ablation for obtaining deeper lesions」主題。共同形成了獨特的指紋。