心臓指数は脳の老化に関連している: フレミングハム心臓研究
Angela L Jefferson1, Jayandra J Himali, Alexa S Beiser
1Department of Neurology, Alzheimer's Disease Center, Boston University School of Medicine, 72 E Concord St, B-7800, Boston, MA 02118, USA. angelaj@bu.edu
Circulation
|August 4, 2010
まとめ
心臓機能の低下は,正常な範囲内であっても,脳老化の加速と関連しています. 低心指数は,年配の成人では,より小さな脳容量とより遅い処理速度と相関しています.
科学分野:
- 心臓病学 心臓病学
- 神経学 神経学とは
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 心臓機能不全は,心血管疾患を持つ高齢者の神経解剖学的および神経心理学的変化と関連しています.
- ハイポパーフュージーは脳パフュージーを妨害し,サブクリニックの脳損傷につながる可能性があります.
- この研究では,心臓機能と臨床前脳マーカーの関連性を調査した.
研究 の 目的:
- 心臓指数で測定される心臓機能が,前臨床的な脳MRIおよび神経心理学的マーカーと関連しているという仮説を検証する.
- 心臓指数とイシュケミアとアルツハイマー病のマーカーとの関係を調査する.
主な方法:
- 脳卒中,TIA,または認知症のない1504人のフレミングハム・オフスプリング・コホート参加者 (年齢61±9歳,54%が女性) が研究されました.
- 脳のMRI,心臓のMRI,神経心理学的検査,および実験室のデータが収集されました.
- 心筋指数 (心筋出力/体表面積) は,脳MRIと神経心理学的変数に関連していた.
主要な成果:
- 心臓指数の上昇は,脳の総容量と情報処理速度と正に関連していた.
- 高い心指数は,側心室の体積と逆に関連していました.
- 心臓指数と脳総体積の関連性は,心血管疾患の有病者を除外した後も維持された.
結論:
- 心臓の機能の低下は,正常な心筋指数レベルでも,脳老化の加速と関連しています.
- この発見は,心臓機能と脳老化を結びつける仮説を裏付けている.
- 観察データは関係を示唆しているが,因果関係は確立できない.
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