マーシャルの帯とアドレネルギー性心房タキアリズム症の関係
1Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
Circulation
|August 24, 1999
まとめ
マーシャルの帯 (LOM) は,腎上腺性心房鼓動不全の源として作用する. LOMの切除は,この活動を停止し,心房細動 (AF) を予防し,AFの発達におけるその役割を示唆します.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 心臓の解剖学 心臓の解剖学
背景:
- アドレナーギー性心房タキアリズム症の起源は,未だに十分に理解されていない.
- マーシャルの帯 (LOM) は,アドレネルジック刺激に敏感であり,これらの不律の潜在的な源であると考えられています.
研究 の 目的:
- アドレナーギー性心房不律症の源としてマーシャルの帯 (LOM) の役割を調査する.
- 慢性刺激後の心房細動 (AF) の発生にLOMが関与しているかどうかを判断する.
主な方法:
- 隔離され浸透した犬の左心房組織のコンピュータマッピング.
- 慢性心房細動 (AF) の誘導は,急速なペースによって行われます.
- LOMの神経の存在に対する免疫細胞化学分析.
主要な成果:
- イソプロテレノールに敏感な自発的な自動リズムが,正常およびAFの両方の犬の心房のLOMから発生しました.
- AF組織では,LOM活動が複数の波紋AFへと移行した.
- LOMの消去は自発的な活動を廃止し,AFを予防しました.
- LOMは,筋肉の経路と交感神経 (タイロシンヒドロキシラゼ陽性) の内置を示した.
結論:
- LOMは交感神経によって密集的に神経化され,イソプロテレノールに敏感な焦点自動活動の源として機能します.
- イソプロテレノール感受性は,長期にわたる急速なペースアップの後,LOMでアップレギュレーションされ,AFの発達に潜在的に貢献します.
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