ヒトの飲水に対するプレッサー反応:共感的反射?
J Jordan1, J R Shannon, B K Black
1Clinical Research Center, Franz Volhard Clinic, Berlin, Germany.
Circulation
|February 9, 2000
まとめ
飲料水は,同情活動を増やすことで,自律機能不全の患者の血圧を著しく上昇させます. この発見は,静止性低血圧の潜在的な治療法を提供し,水分を強調しています.
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
背景:
- 水分摂取は,自律機能不全や高齢者の血圧を急激に上昇させます.
- このプレッサー反応の基礎となる生理学的メカニズムは不明である.
研究 の 目的:
- 自律機能不全の患者および対照群における水分摂取に対する血圧反応を調査する.
- 飲料水のプレッサー効果に起因するメカニズムを解明する.
主な方法:
- 47人の自律機能不全患者 (多系統性縮および純自律機能不全) と対照群で,水分摂取後に座っている状態での血圧の変化を評価した.
- 血のノルエピネフリン,レニン活性,バソプレシン,血液量などを測定した.
- 交感機能の役割を調べるためにトリメタファンの注入を活用しました.
主要な成果:
- 水分摂取後の自律機能不全患者で観察された深度の静脈動脈血圧上昇 (33-37 mm Hg).
- 年配の対照群ではシストリック血圧の有意な上昇 (11 mm Hg) が認められたが,若い対照群ではそうではなかった.
- 水を飲むと,患者と対照群の両方で血のノルエピネフリン濃度が上昇し,交感活性化を示す.
結論:
- 口水摂取は,同情神経系の活動を迅速かつ有意に高めます.
- この水の圧縮効果は,自律機能不全において顕著であり,オートスタティック低血圧管理に潜在的に役立ちます.
- 水の圧力効果は,心臓血管薬を含む臨床試験における重要な,しばしば見過ごされる要因です.
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