所属 |
附属病院 第二内科 |
生年 |
1986年 |
研究室住所 |
秋田市広面字蓮沼44-2 |
研究室電話 |
018-884-6110 |
メールアドレス |
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岩川 英弘 (イワカワ ヒデヒロ)
IWAKAWA Hidehiro
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研究等業績 【 表示 / 非表示 】
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Iwakawa H.
HeartRhythm Case Reports ( HeartRhythm Case Reports ) 11 ( 2 ) 114 - 117 2025年02月 [査読有り]
研究論文(学術雑誌)
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Kobayashi Y.
Circulation Journal ( Circulation Journal ) 88 ( 10 ) 1716 2024年10月 [査読有り]
研究論文(学術雑誌) 国内共著
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Tashiro H.
Journal of Arrhythmia ( Journal of Arrhythmia ) 40 ( 4 ) 991 - 997 2024年08月 [査読有り]
研究論文(学術雑誌)
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Takigawa M.
Journal of Arrhythmia ( Journal of Arrhythmia ) 40 ( 3 ) 536 - 551 2024年06月 [査読有り]
研究論文(学術雑誌)
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Iwakawa H.
Journal of Cardiovascular Electrophysiology ( Journal of Cardiovascular Electrophysiology ) 2024年 [査読有り]
研究論文(学術雑誌)
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Iwakawa H.
Circulation Journal ( Circulation Journal ) 87 ( 12 ) 1757 - 1764 2023年
<p><b><i>Background:</i></b> For lesion size prediction, each input parameter, including ablation energy (AE), and output parameter, such as impedance, is individually used. We hypothesize that using both parameters simultaneously may be more optimal.</p><p><b><i>Methods and Results:</i></b> Radiofrequency applications at a range of power (30–50 W), contact force (10 g and 20 g), duration (10–60 s), and catheter orientation with normal saline (NS)- or half-normal saline (HNS)-irrigation were performed in excised porcine hearts. The correlations, with lesion size of AE, absolute impedance drop (∆Imp-drop), relative impedance drop (%Imp-drop), and AE*%Imp-drop were examined. Lesion size was analyzed in 283 of 288 lesions (NS-irrigation, n=142; HNS-irrigation, n=141) without steam pops. AE*%Imp-drop consistently showed the strongest correlations with lesion maximum depth (NS-irrigation, ρ=0.91; HNS-irrigation, ρ=0.94), surface area (NS-irrigation, ρ=0.87; HNS-irrigation, ρ=0.86), and volume (NS-irrigation, ρ=0.94; HNS-irrigation, ρ=0.94) compared with the other parameters. Moreover, compared with AE alone, AE*%Imp-drop significantly improved the strength of correlation with lesion maximum depth (AE vs. AE*%Imp-drop, ρ=0.83 vs. 0.91, P<0.01), surface area (ρ=0.73 vs. 0.87, P<0.01), and volume (ρ=0.84 vs. 0.94, P<0.01) with NS-irrigation. This tendency was also observed with HNS-irrigation. Parallel catheter orientation showed a better correlation with lesion depth and volume using ∆Imp-drop, %Imp-drop, and AE*%Imp-drop than perpendicular orientation.</p><p><b><i>Conclusions:</i></b> The combination of input and output parameters is more optimal than each single parameter for lesion prediction.</p>