ヴェラパミルの動脈縮性停止に対する心筋縮性耐性に対する効果:カリウム停止と比較
C Robb-Nicholson1, W D Currie, A S Wechsler
1Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.
Circulation
|September 1, 1978
まとめ
ヴェラパミルは,心臓の機能とイシュケミアの後のエネルギー貯蔵を著しく改善します. この薬は,カルシウムの流れを阻害することで,心臓の機能を維持する上でカリウムを上回る心臓麻痺と保護効果を提供します.
科学分野:
- 心臓病学 心臓病学
- 薬理学 薬理学とは
- 生理学 生理学とは
背景:
- グローバル・イシュケミアは,心筋機能と高エネルギーリン酸塩の有意な喪失につながります.
- 缺血および再注射中のカルシウムの流入は,細胞損傷に寄与する.
研究 の 目的:
- グローバル・イシュケミアおよび再注射中の単離されたラット・ハートに対するヴェラパミルの代謝および生理学的効果を評価する.
- ヴェラパミルの保護機構,特に高エネルギーリン酸と心臓機能への影響を評価する.
主な方法:
- 隔離され, perfused ネズミの心臓は,60分の世界的なイシュケミアに服し,その後40分の再注射を受けた.
- 生理学的パラメータ (血圧,心拍数,血流,心拍出力) と心筋高エネルギーリン酸 (ATP,CP) を測定した.
- 心臓はイシュケミアの前にはヴェラパミル (2マイクログ/cc) で治療され,未治療対照群とカリウム治療と比較した.
主要な成果:
- 治療を受けていない心臓は,機能の<15%が回復し,高エネルギーリン酸塩の50%が失われました.
- ベラパミルで治療された心臓は,正常なATPを保持し,正常なATPの85%以上の機能を回復し,CPレベルが40%低下しました.
- ヴェラパミルの保護効果は,おそらく膜結合とカルシウムフルースの阻害により,カリウムよりも長く続いた.
結論:
- ヴェラパミルは,赤血性ネズミの心臓に有意な心臓麻痺と保護効果を示しています.
- 薬剤の有効性は,サルコレルマ膜を横断するカルシウム流の抑制に起因する.
- ベラパミルは,未治療の心臓とカリウムと比較して,心臓機能とエネルギー代謝の優れた保存を提供します.
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