リパーフュージョン時に投与された短期間作用のベータアドレナジックアンタゴニストエスモロールは,長時間の心房細動後の生存率を向上させます
Cheryl R Killingsworth1, Chih-Chang Wei, Louis J Dell'Italia
1Cardiac Rhythm Management Laboratory, Division of Cardiovascular Diseases, Department of Medicine, University of Alabama at Birmingham, AL 35294-0019, USA. crk@crml.uab.edu
Circulation
|May 5, 2004
まとめ
高濃度のカテキオラミンは,長時間の心房細動 (VF) と除細動の後,急激に増加します. ベータブロッカーであるエスモロールを再注射時に投与すると,心停止モデルにおける生存率が改善されます.
科学分野:
- 心臓病学 心臓病学
- 緊急医療 緊急医療
- 薬理学 薬理学とは
背景:
- 高濃度のカテキオラミンは心臓細胞に毒性があります.
- 静脈細動 (VF),除細動,再注血は,カテキオラミンの急増につながる可能性があります.
研究 の 目的:
- 長期VF,除細動,再注血後の心筋のインタースティシャルカテキオラミンレベルを調査する.
- エスモロルがこのカテキオラミン急増から保護し,生存率を改善するかどうかを判断する.
主な方法:
- 豚の放射酵素測定を用いた心筋間液と血における定量化されたカテキオラミン.
- 8分間VFを誘導し,その後,除細動と再注血を行いました.
- エスモロールまたは塩溶液を投与し,別のグループで再注射した.
主要な成果:
- 筋動脈のインタースティシャルノレピネフリンとエピネフリンのレベルは,VFの間に有意に増加し,除細動後にピークに達しました.
- エスモロールの投与は,自発的な循環の回復を改善しました.
- エスモロール治療は,塩素 (3/8) に比べて4時間生存率 (7/8) が著しく高かった.
結論:
- 心筋カテキオラミンの大量かつ一時的な上昇は,長時間VF,除細動,再注射の後で発生します.
- エスモロールのような短期間のベータ抗原薬の早期投与は,心停止後の生存率を高めます.
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