ヒトにおけるシミュレートされた心室動脈短拍動脈の間に,交感活動に対する反射制御
M L Smith1, J A Joglar, S L Wasmund
1Department of Integrative Physiology, University of North Texas Health Science Center, Ft Worth, Texas, USA. msmith@hsc.unt.edu
Circulation
|August 10, 1999
まとめ
動脈のバロ受容体は,ヒトにおける心室性タキアリズム症の間,主として交感神経活動 (SNA) を制御する. 心肺気管の気球受容体 (baroreceptors) も重要な役割を果たし,同情反応に阻害的調節を提供する.
科学分野:
- 心血管の生理学 心血管の生理学
- 自律神経系の調節 自動神経系の調節
- バロ受容体の機能
背景:
- Ventricular tachyarrhythmiasは,バーロ受容体を独特に刺激する.
- 人間の交感神経活動 (SNA) に及ぼす影響は,完全に理解されていません.
- 律動不全時の自律的制御におけるバーロ受容体の役割を調査することは極めて重要です.
研究 の 目的:
- 心肺循環器と動脈循環器の相対的な貢献を決定する.
- 静脈ペースの際にSNAと動脈圧のコントロールを理解するために.
- 心律不全時の自律的反応を解明する.
主な方法:
- ベントリキュラー・ペースング中のSNAと血液動力学的反応を,ニトロプルーシド注入と比較した.
- ヘッドアップの傾きとフェニルエフリンは,バロレセプター刺激を隔離するために利用されました.
- 制御された条件下でSNAと動脈圧の関係を分析した.
主要な成果:
- 動脈バロレフレクスの制御は,心室ペースよりも,ニトロプルスサイド輸液中により支配的でした.
- ペーシング中に動脈圧が正常に戻ったとき,SNAは低下した.
- ペースアップ中に心臓の充填圧を正常化すると,SNAがより大きく増加しました.
結論:
- 動脈のバロレフレクスは,ヒトの心室性タキアリズム症において,主として交感刺激を媒介する.
- 心肺性バルオ受容体は,SNAの有意な抑制調節を提供する.
- これらの発見は,鼓動不良時の自律制御に対するバーロ受容体の影響を明確にします.
キーワード:
非プログラム的なものです.関連する概念動画
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