現在の心臓発作リスク評価ツールの限界を指摘(Current Heart Attack Screening Tools Are Not Optimal and Fail to Identify Half the People Who Are at Risk)

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2025-11-21 マウントサイナイ医療システム(MSHS)

Mount Sinai の研究チームは、現在広く使われている心筋梗塞(ハートアタック)リスク評価ツールが、実際には高リスク者の約半数を検出できていないことを明らかにした。従来のスクリーニングは年齢・血圧・コレステロール値など伝統的指標に依存しており、若年者や正常コレステロール値の人でも心筋梗塞を起こしうることを十分捉えられていない。研究者らは、冠動脈の炎症や線維化、プラーク不安定性など最新のバイオマーカーを加えることで、リスク層別化が大幅に改善すると指摘。特に冠動脈 CT 画像から得られる「脂肪組織の炎症指標」や「プラーク微小構造」などが、隠れた高リスク者の発見に有効であるとした。今後は、これらの高度指標を組み込んだ“次世代スクリーニング”によって、心筋梗塞の予防精度向上が期待される。

現在の心臓発作リスク評価ツールの限界を指摘(Current Heart Attack Screening Tools Are Not Optimal and Fail to Identify Half the People Who Are at Risk)
Figure illustrates the distribution of risk categories and symptom timing.

<関連情報>

初回心筋梗塞の予測におけるリスクおよび症状に基づくスクリーニングの限界
Limitations of Risk- and Symptom-Based Screening in Predicting First Myocardial Infarction

Anna S. Mueller, Jonathon Leipsic, Matthew Tomey, Edgar Argulian, Jagat Narula, and Amir Ahmadi
Journal of the American College of Cardiology: Advances  Published:21 November 2025

Cardiovascular disease (CVD) remains the leading cause of mortality worldwide, posing a major public health challenge. Traditional screening relies on multivariable risk calculators and symptom evaluation to guide preventive strategies like lipid-lowering therapy and diagnostic testing. Patients deemed low risk and without symptoms are often reassured without further evaluation. Recent evidence suggests that this approach, based on population-level studies linking high atherosclerotic cardiovascular disease (ASCVD) risk scores and symptoms to increased cardiovascular events, may overlook at-risk individuals, as many patients do not align with expected risk profiles.

What is the clinical question being addressed?
Can ASCVD risk scores and symptoms reliably identify patients at risk for a first ACS event?

What is the main finding?
Nearly half of patients who presented with their first MI had low or borderline ASCVD scores, and most experienced no symptoms up until shortly before their event, highlighting missed opportunities for early detection and prevention with our current strategy.

To our knowledge, this is the first study to evaluate the efficacy of risk- and symptom-based screening as gatekeepers for cardiovascular prevention in patients under 66 years of age presenting with their first acute coronary syndrome (ACS) event. By simulating how guideline-directed tools would have performed if applied 2 days before presentation, this study assesses whether these individuals would have been identified as at risk and recommended for preventive therapy or further evaluation.

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