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主要PCI後に短期的なMACEを減らすために1日2回CLOpidogrelとTicagrelor:TADCLOT試験
Abdul Hakeem1, Jehangir Ali Shah1, Rajesh Kumar1
1National Institute of Cardiovascular Diseases (NICVD), Rafiqui Shaheed Road, Karachi- 75510, Pakistan.
Journal of the American College of Cardiology
|September 2, 2025
まとめ
初回皮経冠動脈干渉 (PCI) の1ヶ月後の主要な心血管不良事件 (MACE) を減らすために,チカグレロールは,日2回クロピドグレルより優れませんでした. しかし,チカグレロはPCI後の最初の2週間でMACEを著しく低下させた.
科学分野:
- 心臓病科
- 介入心臓科
- 薬理学について
背景:
- ST上昇性心筋梗塞 (STEMI) の初回皮経冠動脈介入 (PCI) 後の最初の月は,主要な心血管疾患 (MACE) のリスクが最も高い.
- しかし,PCI後のSTEMIにおける直接比較データは限られている.
研究 の 目的:
- 1日2回投与されたクロピドグレルと比較して,STEMIに対するPCI後の最初の1ヶ月以内にMACEを減少させる効果を評価する.
主な方法:
- TADCLOT試験は,初回PCIから24時間以内に2, 201人のSTEMI患者を対象とした,ダブルブラインド,ランダム化優位性試験でした.
- 患者はチカグレロール (180 mg 充填,90 mg BID) またはクロピドグレル (600 mg 充填,75 mg BID) を1ヶ月間毎日2回投与した.
- 主なエンドポイントは30日後のMACE (死亡,心筋梗塞,ステント血栓症,脳卒中,または標的病変の再血管化) でした.
主要な成果:
- 30日後にチカグレロ (2. 2%) とクロピドグレル (2. 9%) の間でMACEの有意な差は認められなかった (HR 0. 75; P=0. 28).
- 臨床的に有意な出血の割合はグループ間で類似した (0. 5% のチカグレロと 0. 4% のクロピドグレル).
- クロピドグレルを1日2回投与と比較して,チカグレロは7日 (HR 0. 15; P=0. 002) と14日 (HR 0. 46; P=0. 02) でMACEの有意な減少を示した.
結論:
- 主要PCIの1ヶ月後のMACEの予防において,チカグレロールは,同等の出血率で,毎日2回投与されるクロピドグレルより優れていると証明されませんでした.
- 最初の2週間でMACEを減少させた.
- この研究では,MACEの総発生率は予想より低かったが,早期の予防はチカグレロを好む可能性があることを示唆している.
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