冠動脈ステント設置後の二重抗血小板治療の短期対長期持続時間:ランダム化された多センター試験
Marco Valgimigli1, Gianluca Campo, Monia Monti
1University of Ferrara, Cardiovascular Institute, Arcispedale S. Anna Hospital, Ferrara, Italy. vlgmrc@unife.it
Circulation
|March 23, 2012
まとめ
冠動脈ステント設置後,二重抗血小板治療を24ヶ月まで延長しても,主要な有害事象に関して6ヶ月以上の有意な効果は示されなかった. しかし,より長い治療は,薬剤エリューテーションまたは裸金属ステントを受けた患者の出血リスクを増加させた.
科学分野:
- 心臓病学 心臓病学
- 介入性心臓病学 介入性心臓病学
- クリニック・トライアル 臨床試験
背景:
- 冠動脈ステント設置後の二重抗血小板療法 (DAPT) の最適な持続時間はよく定義されていません.
- 長期的なDAPTのリスク・ベネフィットは,さらなる調査を必要としています.
- この研究は,様々なステントタイプを持つ多様な患者集団におけるDAPTの持続時間を扱っています.
研究 の 目的:
- 冠動脈ステント設置後,DAPTの効果と安全性を6カ月対24カ月で比較する.
- 主要な不良心血管および脳血管イベントに対するDAPTの持続時間の影響を評価する.
- 異なるDAPTの持続時間に関連した出血のリスクを評価するために.
主な方法:
- 2013年に裸金属,ゾタロリムス排出,パクリタキセル排出,またはエベロリムス排出ステントを投与された患者のランダム化試験.
- 患者は,ステント設置後の6か24ヶ月のクロピドグレルとアスピリン療法に割り当てられました.
- 主要エンドポイント:死亡,心筋梗塞,または脳血管事故の複合.
主要な成果:
- 6ヶ月のDAPT群と24ヶ月のDAPT群の2年後のプライマリーアウトカムにおいて有意な差はありませんでした (10.0%対10.1%,HR 0.98,P=0.91).
- 死,心筋梗塞, cerebrovascular accident, stent thrombosisの個別のリスクは,グループ間で類似していた.
- すべての出血の定義において,24ヶ月のDAPTで出血のリスクが著しく高いことが観察されました.
結論:
- 24ヶ月のクロピドグレル療法は,ステント設置後の主要な有害事象の予防において6ヶ月の療法を上回らなかった.
- DAPTの長期間 (24ヶ月) は,出血のリスクの増加と関連しています.
- これらの発見は,患者のリスクプロファイルに基づいて個別化されたDAPT期間決定の必要性を示唆しています.
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