Clinical Usefulness of the Atrial Double Potential at the Intercaval Region in the Right Atrium. A New Index for Inducibility of Atrial Fibrillation in Electrophysiologic Studies.:A New Index for Inducibility of Atrial Fibrillation in Electrophysiologic S
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概要
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The second deflection of the atrial double potential (DP) recorded at the intercaval region is considered to reflect the far-field potential of the left atrium. The conduction via the upper interatrial connection was evaluated utilizing this DP and the relationship between atrial fibrillation (AF) and the conduction via the interatrial connection evaluated. In 30 consecutive patients with the DP at the intercaval region, prolongation in the left atrial activation time during the right atrial extra stimulation was measured at the intercaval region (ΔDP) and the coronary sinus (ΔCS). The difference between ΔDP and ΔCS (ΔDP-ΔCS) was used as an index of inhomogeneity in interatrial conduction. The patients were divided into AF (n=13) and non-AF (n=17) groups in accordance with the inducibility of AF in the electrophysiologic study. The max ΔDP and the max ΔCS were greater in the AF group than in the non-AF group, i.e., max ΔDP (43±19 vs 27±17 ms, P=0.021), max ΔCS (35±15 vs 21±14 ms, P=0.029). The max |ΔDP-ΔCS| was also greater in the AF group than in the non-AF group (19±12 vs 9±8 ms, P=0.019). In accordance with the indices of the interatrial conductions, the delayed or inhomogeneous conductions during the atrial extra stimulation via interatrial connections were more prominent in the AF group than in the non-AF group. Analysis of the DP at the intercaval region might provide a useful index to evaluate the inducibility of AF.
- International Heart Journal刊行会の論文
著者
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Moriguchi Masahiko
Department Of Cardio-angiology Kitasato University School Of Medicine
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Yoshizawa Naoto
Department of Cardiovascular Medicine, Kitasato University Graduate School of Medicine
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Kitano Yoshikazu
Department Of Applied Biological Science Tokyo Noko University
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Hara Hideyuki
Department Of Electro Photo Optics Faculty Of Engineering Tokai University
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Izumi Tohru
Department Of Angio-cardiology Kitasato University School Of Medicine
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Niwano Shinichi
Department of Internal Medicine, Kitasato University School of Medicine
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Niwano Shinichi
Department of Angio-Cardiology, Kitasato University School of Medicine
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Kitano Yoshikazu
Department of Internal Medicine, Kitasato University School of Medicine
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