冠動脈疾患患者の経口抗凝固剤療法:メタ解析
1Program of Preventive Cardiology and Therapeutics, Hamilton Civic Hospitals Research Centre, McMaster University, Ontario, Canada. anands@fhs.mcmaster.ca
JAMA
|December 11, 1999
まとめ
高強度口服抗凝固剤 (OA) は,冠動脈疾患 (CAD) の患者における死亡率と心筋梗塞 (MI) を効果的に軽減するが,出血リスクを増加させる. 中程度の強度のOAは,心臓発作や脳卒中を軽減し,出血のリスクも高まります.
科学分野:
- 心血管医学は,心臓血管医学である.
- 薬理学 薬理学とは
- クリニック・トライアル 臨床試験
背景:
- 冠動脈疾患 (CAD) の管理における経口抗凝固剤 (OA) の役割は,広範な研究にもかかわらず,議論の対象であり続けています.
- 既存の研究では,OAの有効性が調査されていますが,長期間使用に関する明確なコンセンサスは,特に強度によって層分かれていますが,不足しています.
研究 の 目的:
- 冠動脈疾患 (CAD) の患者における経口抗凝固剤 (OA) 治療の長期的な効果を評価する.
- 主要な臨床結果に対する抗凝固剤の強度と同時アスピリンの使用に基づいて,OA治療の影響を層分けする.
主な方法:
- 1960年から1999年7月に出版されたランダム化対照試験の体系的レビュー,包括的なデータベース検索 (MEDLINE,EMBASE,CURRENT CONTENTS) と専門家の相談を通じて特定された.
- 参加基準には,CADの患者,最低3ヶ月間のOA治療期間,およびランダム化試験の設計が必要でした.
- 2人の独立した観察者によるデータ抽象には,OAのタイプ,持続時間,モニタリング,死亡率,心筋梗塞 (MI),脳卒中,血栓栓塞栓性イベント,出血が含まれていました.
主要な成果:
- 高強度OA (INR 2.8-4.8) は,死亡率 (22%),心筋梗塞 (42%),脳卒中 (63%) を著しく低下させましたが,対照群と比較して大出血を6倍増加させました.
- 中等強度のOA (INR 2-3) も,MI (52%) と脳卒中 (53%) を減少させましたが,出血は7.7倍増加しました.
- 中程度の強度から高強度までのOAとアスピリンの併用療法により,不良事象の有望な減少が示され,出血リスクの控えめな増加 (1.9倍) が示されました.
結論:
- 高濃度および中等濃度の経口抗凝固剤は,心臓発作と脳卒中を低減する効果がありますが,出血のリスクを高めます.
- アスピリンによる低強度OAは,アスピリン単独よりも優れていません. アスピリンによる中等強度から高強度OAは,潜在的な効果を示していますが,さらなる検証が必要です.
- これらの発見は,CAD管理のためのOAの強度を選択する際に,抗血栓効果と出血リスクのバランスをとることの重要性を強調しています.
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