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KMID : 1011920230240010010
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International Journal of Arrhythmia
2023 Volume.24 No. 1 p.10 ~ p.10
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Impedance drop determines ablation lesion volume at the same level of ablation index
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Oh Se-Il
Choe Won-Seok
Lee So-Ryoung
Choi Eue-Keun
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Abstract
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New parameters such as ablation index (AI) have been developed to create reliable ablation lesions. This study was performed to evaluate whether RF energy delivery with the same ablation index creates the similar ablation lesion volume. Ablation lesions were created in 5 pig hearts at ex-vivo state. Ablation was performed using an external-irrigation contact-force sensing catheter on the epicardial side of the left ventricle with 90-degree of angle. RF ablation time was adjusted for targeting AI 600 at 8 different conditions. Lesion volume created with 0?5 g of contact force at 20 W was significantly lower than that of 11?20 g at 40W despite of the same AI (125?±?76.2 vs. 272?±?49.5 mm3, P?
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KEYWORD
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Ablation index, Impedance, Contact force
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