センター コマンドと 運動 心拍の制御 保存されたエジェクション 断片による心不全における反応
Satyam Sarma1,2, Erin Howden3, Justin Lawley4
1Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas (S.S., M.S., B.D.L.).
Circulation
|November 18, 2020
まとめ
運動心拍を調節する自律的経路は,保存されたエジェクション分数 (HFpEF) の心不全で無傷である. HFpEF患者のピーク運動心拍数が低いにもかかわらず,中央制御とメタボレセプター機能は対照群と比較して正常である.
科学分野:
- 心臓病科
- 運動 生理学
- 自律神経科学
背景:
- 慢性無能症は,エアロビック能力に影響を与える,保存されたエジェクション分数 (HFpEF) の心不全で一般的です.
- HFpEFにおける運動中に心拍数を上昇させる自律信号伝達経路の完全性はよく理解されていません.
- HFpEFにおける運動制限を理解するために,中央コマンドと筋肉のメタボレセプター機能を調査することが重要です.
研究 の 目的:
- HFpEF患者における中央指令と筋肉のメタボレセプター経路の機能を調査する.
- HFpEF患者と健康な高齢者対照群の間でこれらの自律的機能を比較する.
- 自律信号の障害がHFpEFにおけるクロノトロプ的不適格性に寄与するかどうかを判断する.
主な方法:
- ピーク酸素消費量 (Vo2) と心拍数を測定する心肺運動検査
- 運動後の循環停止を伴う静的な握手運動で,中央制御とメタボレセプター機能を評価する.
- 20人のHFpEF患者と14人の上級対照群の心拍数,血圧,および自律反応の比較
主要な成果:
- HFpEFの患者は,対照群と比較してピークVo2とピーク運動心拍数が著しく低下した.
- HFpEF患者と対照群の間で,静的なハンドグリップ時のピーク心拍の反応において,有意な差異は認められなかった.
- 運動後の平均動脈血圧で評価された代謝受容体の機能は,グループ間で有意に異なるものではありませんでした.
結論:
- HFpEFの患者では,中央指令とメタボレセプター機能が保たれています.
- 運動能力の低下にもかかわらず,運動心拍の反応を調節する重要な自律的反射経路は,HFpEFで無傷です.
- これらの発見は,自律信号の障害がHFpEFにおけるクロノトロプ的無能性の主要な原因ではないことを示唆している.
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