安定したアンギナにおける皮膚経冠動脈介入 (ORBITA): ダブルブラインド,ランダム化制御試験
Rasha Al-Lamee1, David Thompson1, Hakim-Moulay Dehbi2
1Imperial College London, London, UK; Imperial College Healthcare NHS Trust, London, UK.
Lancet (London, England)
|November 7, 2017
まとめ
プラセボ治療と比較して,経皮冠動脈干渉 (PCI) は安定した胸痛患者の運動時間を有意に改善しませんでした. この盲検試験は PCI を示唆しています.
科学分野:
- 心臓病科
- 介入心臓科
- 臨床試験
背景:
- パーキュタヌス冠動脈介入 (PCI) は,安定した胸痛の症状緩和のために一般的に使用されます.
- しかし,盲検・プラセボ対照試験による強固なエビデンスは,胸痛の緩和に有効であることを示しています.
研究 の 目的:
- 安定した胸痛と重度の冠動脈狭窄症の患者でPCIとプラセボの効果を評価する.
- PCIが運動能力と症状の緩和に与える影響を盲検でランダムに評価する.
主な方法:
- ORBITA試験は,盲検,多センター,ランダム化制御試験でした.
- 重度の単血管狭窄症の患者は,PCIまたはプラセボによるランダム化による最適化治療を受けた.
- 主なエンドポイントは,心肺運動テストで評価された運動時間増加の違いでした.
主要な成果:
- PCI群とプラセボ群の運動時間増加に有意な違いは認められなかった (16. 6秒,95%CI - 8. 9から42. 0,p=0. 200).
- この研究には200人の患者が参加し,そのうち105人はPCIに,95人はプラセボにランダムに割り当てられました.
- 死亡は発生せず,重篤な有害事象はグループごとに比較され,プラセボ群ではPCIを必要とするいくつかの合併症が発生した.
結論:
- 医学的に治療されたアンギナと重度の冠動脈狭窄症の患者では,PCIはプラセボ治療と比較して,運動時間の有意な追加効果をもたらさなかった.
- この研究は,侵襲的な心臓手術の有効性を評価する際のプラセボ対照試験の重要性を強調しています.
- この集団におけるPCIの症状的効果は,直接的な病変再血管化ではなく,手続的効果によるものであることが示唆される.
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