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心筋梗塞の診断における年齢の影響
Matthew T H Lowry1, Dimitrios Doudesis1,2, Ryan Wereski1
1BHF Centre for Cardiovascular Science (M.T.H.L., D.D., R.W., D.M.K., C.T., A.V.F., A.B., C.T., K.K.L., A.R.C., D.E.N., N.L.M., A.A.), University of Edinburgh, UK.
Circulation
|September 15, 2022
まとめ
心筋梗塞に対する心臓トロポニン検査の精度は高齢者において低下する. 標準的な値は,老年患者における特異性低下とポジティブな予測値を示しており,個別化された診断戦略が必要である.
科学分野:
- 心臓病科
- 医療診断
- 高齢者医療
背景:
- 心臓のトロポニンは,心筋梗塞 (MI) を診断するための重要なバイオマーカーです.
- トロポニンの標準診断基準は,健康な集団の99センチルに基づいています.
- トロポニンの濃度は患者の年齢によって大きく影響され,診断の正確さに影響します.
研究 の 目的:
- 心筋梗塞の疑いのある高齢者の心臓トロポニン検査の診断性能を評価する.
- 心臓トロポニン検査の感度と特異性に対する年齢の影響を評価する.
- ガイドラインで推奨される値と年齢調整された値を比較する.
主な方法:
- 心筋梗塞の疑いのある患者を対象とした多センター試験の二次分析
- 高感度心臓トロポニンIの診断精度評価 3つの年齢層: < 50, 50-74歳, ≥75歳
- ガイドラインで推奨された性別別および年齢調整された99センチルの値を用いて分析した.
主要な成果:
- 46, 435人の患者で,心筋梗塞の罹患率は11%でした.
- 心臓発作に対する感受性は,ガイドラインの値を用いて,各年齢層で (79. 2% から 81. 6%) 類似した.
- 年齢とともに特異性は著しく低下し,50歳未満の98. 3%から75歳以上で82. 6%に減少した.
結論:
- 年齢は心臓のトロポニンの診断能力に大きく影響し,老年患者の特異性と前兆を低下させる.
- ガイドラインで推奨された値も年齢調整された値も,年齢による診断精度の低下を完全に克服することはできません.
- バイナリな値だけ調整するのではなく,高齢者のMI診断には個別化された診断方法が必要です.
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