高リスクの無症状集団における隠された冠動脈疾患の検出
Roger S Blumenthal1, Diane M Becker, Lisa R Yanek
1Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. rblument@jhmi.edu
Circulation
|February 13, 2003
まとめ
冠動脈疾患 (CAD) の家族歴を有する無症状の個体における異常な運動ストレステストは,しばしば重度の閉塞ではなく,軽度の動脈硬化を示します. perfusion 欠陥は,血管運動機能不全またはプラークに起因する可能性があります.
科学分野:
- 心臓病学 心臓病学
- 診断用イメージング
- 予防医学は,予防的な医療です.
背景:
- 運動ストレステストとペルフュージョン画像は,症状のある患者の閉塞性冠動脈疾患 (CAD) の診断の標準です.
- 早期CADの家族歴を有する無症状の個体における異常な機能的運動テストの意義は不明である.
研究 の 目的:
- 異常な運動テストの結果と,CADの家族歴のある無症状の個体における冠動脈動脈硬化症の重症度の間の相関を調査する.
主な方法:
- 文書化されたCADの患者の無症状の734人の兄弟姉妹を評価しました.
- 153人の被験者は,運動テスト,タリウムスキャン,またはその両方において異常を示した.
- 105人が定量的な狭窄症の分析のために冠動脈血管撮影を受けた.
主要な成果:
- 参加者の95%が冠動脈動脈硬化症で,39%だけが狭窄症で>=50%でした.
- 両方の異常な検査を受けた人のうち,70%が狭窄症 >=50%でした.
- perfusion defects を供給する動脈は,平均的に 43+/-31%の狭窄を示し, 68% <50%でした.
結論:
- CADの家族歴を有する無症状の個体における異常な運動シンチグラフィは,主に軽度の冠動脈動脈硬化症を特定します.
- perfusion defects は,動脈硬化性プラークに加えて,冠動脈血管運動機能不全によるものかもしれません.
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