実験的な体積過負荷による収縮機能障害のある犬における冠動脈血流
B A Carabello1, K Nakano, K Ishihara
1Cardiology Division, Medical University of South Carolina, Charleston 29425.
Circulation
|March 11, 1991
まとめ
冠動脈の血流の異常は,体積過負荷の収縮機能不全を引き起こさない. この状態の犬は,ストレスのとき,重要な冠動脈血流の準備を維持します.
科学分野:
- 心血管生理学 心血管の生理学
- 心臓高縮症 (ハート・ハイパートロフィー) とは
背景:
- 冠動脈の血流の異常は,圧力の過剰負荷の高圧で収縮機能障害を引き起こす.
- 容量過負荷高縮症における冠動脈血流の役割はあまり理解されていない.
研究 の 目的:
- 冠動脈の血流の異常が収縮機能障害を引き起こすかどうかをテストするために,実験的な体積過負荷高縮症.
主な方法:
- 慢性的なミトラル吐症の犬の静止状態およびペースング中の冠動脈の血流を調べた.
- 左心室の質量と収縮機能の測定.
- アデノシン注入と急速な心房ペースの際に評価された冠動脈血流量.
主要な成果:
- ミトラル反発は左心房高症と収縮機能不全を引き起こした.
- 静止中の冠動脈の血流は,ミトラルリグルジテーションと対照犬に類似していました.
- 冠動脈の血流は,ミトラルリグルジテーションの犬のペースとアデノシンで適切に増加し,冠動脈の流れの準備が保たれていることを示しています.
結論:
- 冠動脈の血流の異常は, mitrale regurgitation-induced hypertrophyにおける静止収縮機能不全を説明しない.
- 大量の冠動脈血流の準備は,この体積過剰負荷高縮のモデルに存在する.
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