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不安定性胸痛における血栓解離. ランダム化されたt-PAとプラセボのダブルブラインド試験
M R Freeman1, A Langer, R F Wilson
1Department of Medicine, St. Michael's Hospital, University of Toronto, Ontario, Canada.
Circulation
|January 1, 1992
まとめ
組織型プラズミノゲン活性化剤 (t-PA) は,不安定な胸痛患者の冠内血栓を減少させましたが,心臓のイベントを有意に減少させませんでした. t-PA を確認するためにさらなる研究が必要である.
科学分野:
- 心臓病学 心臓病学
- トロンボシス研究研究
- 薬理学 薬理学とは
背景:
- 冠動脈栓塞は,不安定な胸痛の病原性において重要な役割を果たします.
- 血栓性イベントは,入院中の心臓合併症と相関しています.
研究 の 目的:
- 不安定性アンギナにおける心臓イベントの減少における血栓解消剤療法の有効性を調査する.
- 組織型プラズミノゲンアクティベーター (t-PA) が心臓イベントやイシュケミアのマーカーに与える影響を評価する.
主な方法:
- 70人の不安定なアンギナ患者のランダム化試験で,t-PA輸注とプラセボを比較した.
- すべての患者はヘパリンとアスピリンを受けた.
- 主要エンドポイントは,入院死亡,心筋梗塞,緊急再血管化でした.
- 2次評価には,心筋 perfusion (タリウムスシンチグラフィー),静音性 ischemia (ホルターモニタリング),冠動脈血管撮影が含まれていました.
主要な成果:
- t-PA群とプラセボ群の病院内心疾患の合計で有意な差はありません.
- t-PAはプラセボと比較して冠内血栓を有意に減少させた (52%対92%).
- t-PAを受けた患者は,より大きな休息タリウム欠陥とSTシフトのより長い期間を示し,心筋 perfusionと ischemiaのパラドックス的な悪化を示唆しました.
結論:
- 不安定性アンギナにおける長期のt-PA注入は,冠内血栓を減少させるが,入院中の心臓発作を有意に減少させるわけではない.
- 治療効果を排除するのに十分なパワーは研究に欠けているかもしれません.
- 矛盾する発見は,ヘパリン単独と比較して,t-PAで心筋膜 perfusion と ischemia の潜在的悪化を示唆しています.
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