継続的に強化された管トーンが,二重心房静脈節と付属経路に及ぼす影響
Chuen-Wang Chiou1, Shih-Ann Chen, Ming-Ho Kung
1Division of Cardiology, Veterans General Hospital-Taipei and Kaohsiung, National Yang-Ming University, School of Medicine, Taiwan.
Circulation
|May 14, 2003
まとめ
ヴァガルトーンが向上すると,心房中枢 (AV) の結節経路に著しく影響し,伝導時間と屈折性を長引かせ,特に高速経路で長引かせます. これは,パラシンパシー活動が増加したときに発生するAV結節再侵入性低心率 (AVNRT) を説明する可能性がある.
科学分野:
- 電気生理学 電気生理学
- 心臓病学 心臓病学
- 自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous Nervous System) とは,自律神経系 (Autonomous
背景:
- 二重心房 (AV) 結節および付属経路に対する高気管調子の電気生理学的影響を調査する.
- 心律不全における自律神経系の役割を理解する.
研究 の 目的:
- AV節路および付属経路に対する継続的に強化された管トーンによる電気生理学的効果を評価する.
- 静脈管の刺激が,異なる心臓経路における伝導性と屈折性にどのように影響するかを決定する.
主な方法:
- 20人の患者を研究した (10人のAVノードル再侵入性心拍動脈,10人のAV反転性心拍動脈).
- フェニルエフリン誘発の連続的管増強前およびその間,測定された電気生理学的パラメータ.
- AV節路および付属経路の導電時間と耐火期を評価した.
主要な成果:
- フェニレフリンは,AVNRT患者の前進性高速AV結節経路の 1:1伝導時間および耐火期を延長しました.
- 付属経路の伝導性や屈折性において,有意な変化は観察されなかった.
- 前進の遅い AV 経路と後進の速い AV 経路の伝導と反射性は,ほとんど変わらなかった.
結論:
- 改善された体調は,AVノードル経路に差異的に影響し,特にアンテログラード・ファスト・パス・リフレクター性を延長します.
- これらの電気生理学的変化は,AV結節再侵入性低心率 (AVNRT) の誘導を促進する可能性があります.
- 発見は,睡眠などのパラシンパティックトーンが増加した期間中にAVNRTの発生のメカニズムを示唆しています.
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