ハイパーバリック酸素はインファクトのサイズを制限する 血管不全のウサギの心筋梗塞 in vivo
D L Sterling1, J D Thornton, A Swafford
1Department of Biological Sciences, University of South Alabama, Mobile 36688.
Circulation
|October 1, 1993
まとめ
ハイパーバリック酸素療法では,ウサギのリパーフュージョン損傷後の心筋損傷を大幅に軽減します. この保護効果は,再注射中に高圧酸素が投与されたときに達成される.
科学分野:
- 心臓病学 心臓病学
- ハイパーバリック医学は,
- イシュケミア・リパーフュージョン・ケガ
背景:
- 心筋力衰退と再注射 (I/R) 損傷は,重大な臨床問題である.
- I/R後の死滅を緩和する方法を調査することは,患者のアウトカムを改善するために不可欠です.
研究 の 目的:
- ハイパーバリック酸素 (HBO) が心筋梗塞のウサギのモデルで心臓発作のサイズを減らす効果を評価する.
- 心臓の保護を達成するために,HBO投与の最適なタイミングを決定する.
主な方法:
- オープンチェストのウサギのモデルを使用し,左冠動脈の枝を30分間遮断し,その後3時間の再注射を行った.
- トリフェニルテトラゾリウム染色を用いて心臓発作を定量化した.
- 動物は,I/Rプロセスの異なる段階において,ノルモバリック100%酸素 (1 atm絶対) または高圧酸素 (2.5 atm絶対) に曝露された.
主要な成果:
- コントロール動物 (1 atm酸素) は41.5%の缺血領域の心臓発作を示した.
- 缺血,再注血,またはその両方中の高圧酸素治療により,心臓発作のサイズが著しく減少しました (それぞれ16.2%,14.5%,9.8%;P < .01).
- リパルフュージョン開始から30分後にHBOを投与すると,保護は得られませんでした (35.8%の心臓発作).
結論:
- ハイパーバリック酸素療法では,ウサギにおける心筋再注射損傷の設定において,心臓発作の大きさを効果的に制限します.
- HBOの心臓保護効果は,再注射の開始時に開始されたときに明らかです.
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