Heating distribution of multipolar radiofrequency ablation catheters

Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) Pub Date : 1997-10-30 DOI:10.1109/IEMBS.1997.754491

M. Mirotznik, D.T. Demazumder, J.R. Jones, D. Schwartzman

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引用次数: 3

Abstract

Radiofrequency (RF) catheter ablation therapy has been recognized as an effective treatment for a variety of cardiac arrhythmias. In fact, for several arrhythmias, including Wolf-Parkinson-White Syndrome, this technique is greater than 95% curative. However, when applied for the treatment of ventricular tachycardia or atrial fibrillation, RF catheter ablation has been far less successful. It is believed that the small lesions produced by current RF catheters are not sufficient to reliably treat these disorders. This study presents experimental measurements of heating patterns of commercially available multipolar RF ablation catheters. Three different electrode configurations were investigated. Results revealed significant differences in the catheter specific absorption rate pattern across the different configurations. Further in vitro and in vivo studies are underway to investigate these effects on actual lesion formation.

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多极射频消融导管的热分布

射频(RF)导管消融治疗已被认为是一种有效的治疗各种心律失常。事实上，对于包括Wolf-Parkinson-White综合征在内的几种心律失常，这种技术的治愈率超过95%。然而，当应用于治疗室性心动过速或心房颤动时，射频导管消融远不成功。人们认为，目前射频导管产生的小病变不足以可靠地治疗这些疾病。本研究提出了商用多极射频消融导管加热模式的实验测量。研究了三种不同的电极结构。结果显示，导管在不同配置的特定吸收率模式有显著差异。进一步的体外和体内研究正在进行中，以调查这些对实际病变形成的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136)

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