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ガングリオンメカニズムは,心不全における管制御の低下に寄与する
1Department of Medicine-Cardiology, Veterans Affairs Medical Center and Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio, USA.
Circulation
|June 9, 1999
まとめ
心不全 (HF) は,パラシンパティック・ギャングリオンにおける管制御を低下させる. 犬でのこの研究は,プレガンリオン神経ではなく,外周のエフェルント四肢に欠陥があり,心拍数調節に影響を及ぼすことを明らかにしています.
科学分野:
- 心血管生理学 心血管の生理学
- 自律神経系の機能 自律神経系の機能
- 心不全 病理生理学 心不全 病理生理学
背景:
- 心不全 (HF) では,自発的および刺激された管活動が減少します.
- 機能的なポストシナプス性コレリン作用機構は,HFで上調される.
- HFにおけるポストギャングリオンニューロンの機能は,調査に値する.
研究 の 目的:
- 心不全の犬のモデルにおけるポストギャングリオンニューロンの機能を調査する.
- 心不全におけるパラシンパティックコントロールの低下の場所を特定するために.
主な方法:
- コントロールおよびHFの犬のシノアトリアルノードを神経化するプレガンリオンおよびポストガンリオンパラシンパティックニューロンの電気刺激.
- 刺激に対する反応としてシヌスサイクルの長さの変化の測定.
- 刺激は,ギャングリオンおよびベータアドレナージックブロック下で繰り返された.
主要な成果:
- 子宮頸部バガス刺激は,HF犬の反応を弱めたことを示した.
- 右心房脂肪パッドの刺激は,対照犬とHF犬の違いを示さなかった.
- HF犬では,封鎖下でのゲンリオン後刺激により,ゲンリオン前入力と交感活動とは無関係に,著しく高い反応が示されました.
結論:
- 外縁のエフェルエンスの欠陥,特にパラシンパティック・ギャングリオン内の欠陥は,HFにおけるパラシンパティック・コントロールの弱まりに寄与する.
- この欠陥は,パラシンパティック・ギャングリオン内に位置しています.
- 将来の研究では,弱体化されたギャングリオン伝播のメカニズムに焦点を当てて,動性の回復のための戦略を開発する必要があります.
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