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相关概念视频

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

749
Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
749
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
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相关实验视频

Updated: Jan 7, 2026

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies

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生物标志物 生物标志物

Anran Ran1,2, Yuen Tung Ng3,4,5,6,7, Bonnie Y K Lam3,4,5,6,7

  • 1Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, NA, Hong Kong.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
概括
此摘要是机器生成的。

该RetinAD深度学习模型识别了老年,非痴呆症的患有视网膜微血管病变的个体,这表明它可以预测未来的阿尔茨海默病 (AD) 风险.

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科学领域:

  • 眼科医生 眼科 眼科
  • 神经学 神经学
  • 人工智能的人工智能

背景情况:

  • 阿尔茨海默病 (AD) 与视网膜变化有关.
  • 深度学习模型RetinAD使用视网膜图像将AD痴呆与健康对照区分开来.
  • 视网膜微血管病变可能先于AD的认知症状.

研究的目的:

  • 调查RetinAD是否可以检测非痴呆症老年人视网膜微血管病变.
  • 为了比较视网膜血管网络测量在这个队列中的RetinAD分类的"阳性"和"阴性"病例之间.

主要方法:

  • 从BEAT AD计划中招募了187名具有主观认知衰退 (SCD) 的非痴呆老年人 (59-80岁).
  • 利用RetinAD将受试者分类为AD相关的视网膜变化"阳性"或"阴性".
  • 使用新加坡I血管评估 (SIVA) 软件量化视网膜血管网络.

主要成果:

  • 15.5%的受试者被归类为RetinAD"阳性".
  • "阳性"受试者年龄较大,动脉和静脉分支系数较高.
  • 在调整年龄和血压后,静脉分支系数仍然显著.

结论:

  • 在RetinAD中,不患痴呆症的老年人被发现患有较差的视网膜微血管病变和"生物学上较老"的大脑.
  • 这些发现表明RetinAD有潜力识别未来患AD痴呆症风险的个体.