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Updated: May 12, 2026

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Multiparametric Optical Mapping of the Langendorff-perfused Rabbit Heart
Published on: September 13, 2011
異質な交感性内置は,正常に perfused ウサギの心臓の局所的な心筋再極化に影響します
1Cardiovascular Research Institute, University of California, San Francisco 94143-0252, USA.
Circulation
|March 7, 2000
まとめ
異質な交感性内置は心臓の再極化に影響を与えます. デナーベーションの重度の上昇は,特にノレピネフリン (NE) 刺激で,リポラライゼーションの異常と分散を悪化させた.
科学分野:
- 心血管生理学 心血管の生理学
- 自律神経系とは,自律神経系である.
- 心臓電気生理学 心臓電気生理学
背景:
- 交感神経系の異質性は,致命的な心律不整症と関連しています.
- 心臓のリポラライゼーションに対するインナーベーションの異質性の具体的な影響は不明である.
研究 の 目的:
- シンパティック・デナーヴェーションの重度と心臓の再極化との関係を調査する.
- 異なる刺激タイプ (ニューラルとユーモラル) が,神経化された領域における再極化にどのように影響するかを評価する.
主な方法:
- アクティベーション回復間隔 (ARI) を測定した,ウサギの64の心臓上部部位における地域性脱皮後の活性化回復間隔.
- 定量化された交感性インナーベーションは,autoradiographyを用いて,ARI測定値と比較した.
- 投与されたノレピネフリン (NE) 輸液と左のステラ・ギャングリオン刺激 (SS).
主要な成果:
- ノルエピネフリン (Norepinephrine, NE) は,神経欠損した部位でARIを大幅に短縮し,神経欠損がより重度の部位ではより大きな効果を示した.
- 左の星状のギャングリオン刺激 (SS) も,神経切断された領域のARIを短縮し,神経切断の重さと相関しています.
- デナーベーションの重症度に関係なく,デナーベーションの部位の70%でSSの延長されたARI.
結論:
- 局所再偏極化の程度と分散は,デナーベーションの重度によって影響を受けます.
- 再極化反応は,刺激のタイプ (ニューラル対ユーモラル) に基づいて異なります.
- NE濃度の差異は,さまざまな再偏極化反応を説明する可能性がある.
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