エッセンシャル高血圧において,食事中の中程度のナトリウム制限による短期および長期の神経腎上腺作用
Guido Grassi1, Raffaella Dell'Oro, Gino Seravalle
1Clinica Medica, Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Centro Interuniversitario di Fisiologia Clinica e Ipertensione and Istituto Auxologico Italiano, Milan, Italy.
Circulation
|October 9, 2002
まとめ
精力高血圧における適度なナトリウム制限は,交感神経の活動を増加させ,バロレフレクスの機能を損なう. これらの悪影響は,長期にわたる低ナトリウムダイエットでは持続し,食事中のナトリウム減少のリスクを強調しています.
科学分野:
- 心血管生理学 心血管の生理学
- 高血圧の研究 高血圧の研究
- 神経内分泌学の神経内分泌学
背景:
- エッセンシャル高血圧は,しばしば交感性神経系不調と関連しています.
- 短期的な重度のナトリウム摂取制限は,筋肉交感神経伝達 (MSNA) を急激に増加させ,バロレフレクスを損なう可能性があります.
研究 の 目的:
- 主要高血圧の患者における適度な食中のナトリウム制限の長期的な神経腎上腺および反射効果を調査する.
主な方法:
- 軽度から中等度のエッセンシャル高血圧を有する11人の患者は,血圧,心拍数,MSNAの測定を受けました.
- 測定は,定期的なナトリウム摂取,低ナトリウムダイエット (80 mmol NaCl/d) の1週間後,同じダイエット8週間後に行われました.
主要な成果:
- 1週間の低ナトリウムダイエットは,血レニン活性,アルドステロン,MSNAを23%増加させ,MSNAのバロレフレクスの調節を47%減少させました.
- これらのニューロ・ユーモラルおよびバロ・レフレクスの変化は,8週間後に持続し,通常のナトリウムダイエットに戻ると正常化しました.
結論:
- 適度な食事中のナトリウム制限は,本質的な高血圧において,交感性活性化およびバロレフレクスの障害を誘発する.
- 数週間の持続的な低ナトリウムダイエットは,これらの有害な神経アドレナージックおよび反射的変化を軽減しません.
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