Estimation of mechanical properties by transcatheter monitoring using local impedance and contact force

被引:0
|
作者
Kawakami S. [1 ]
Ogawa E. [1 ,2 ]
Fukaya H. [3 ]
Matsuura G. [3 ]
Aiga S. [2 ]
Kumagai H. [1 ,2 ]
机构
[1] Graduate School of Medical Sciences, Kitasato University, Kanagawa
[2] Allied Health Sciences, Kitasato University, Kanagawa
[3] Department of Cardiovascular Medicine, Kitasato University Hospital, Kanagawa
来源
Journal of Medical Engineering and Technology | 2023年 / 47卷 / 02期
关键词
biomechanical; contact force; local impedance; Radiofrequency catheter ablation;
D O I
10.1080/03091902.2022.2134479
中图分类号
学科分类号
摘要
The mechanical properties of the myocardium in the left ventricle and right atrium were estimated by simultaneously measuring the local impedance (LI) and contact force (CF) using an ablation catheter. Radiofrequency catheter ablation (RFCA) is a well-established arrhythmia treatment. Monitoring the RF power, CF and properties of myocardium during RFCA are necessary to estimate the effect of ablation. Indices, such as CF, lesion size index and ablation index, do not include the myocardium mechanical properties. Therefore, there is the risk of side effects, such as cardiac tamponade, by excessive catheter indentation into vulnerable areas. We propose the simultaneous measurement of LI and CF for estimating the myocardial mechanical properties to reduce the side effects. In this study, an in vitro experimental system was constructed to measure LI and CF via the catheter. The relationship between the porcine myocardial tissue thickness and CF–LI curve was investigated using the left ventricle and right atrium. Power function coefficients approximating the CF–LI curve increased with thicker left ventricle. The thickness of the myocardium can be estimated by simultaneously measuring LI and CF. Intraoperative measurement of the myocardial mechanical properties can be used to determine the ablation conditions at each site. © 2022 Informa UK Limited, trading as Taylor & Francis Group.
引用
收藏
页码:141 / 146
页数:5
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