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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

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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...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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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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生物标志物 生物标志物

Shuhua Ren1, Xiaoxie Mao2, Qi Huang3

  • 1Huashan Hospital, Shanghai, China.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
PubMed
概括

基线脑成像特征如粉样β沉积和海马体积可以预测主观认知衰退 (SCD) 个体的认知衰退. 这些"AN"成像标记物对于了解SCD进展至关重要.

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科学领域:

  • 神经成像是一种神经成像.
  • 认知神经科学 认知神经科学
  • 生物标志物发现发现

背景情况:

  • 主观认知衰退 (SCD) 是痴呆症的前体.
  • 确定可靠的SCD进展生物标志物对于早期干预至关重要.
  • 基线神经成像特征可以预测SCD的未来认知变化.

研究的目的:

  • 为了确定基线大脑粉样β (Aβ) 沉积,海马体积和葡萄糖代谢是否预测SCD的认知变化.
  • 确定用于预测SCD进展的成像生物标志物.

主要方法:

  • 95名受试者 (59名SCD,36名对照) 接受了基线PET/CT (Aβ,葡萄糖代谢) 和MRI (海马体积).
  • 在基线和两年后评估认知功能.
  • 一般线性模型分析了基线成像特征与认知变化率之间的关系.

主要成果:

  • SCD受试者显示了加速执行功能下降的趋势.
  • 基线全脑Aβ沉积预测了命名和执行功能的变化.
  • 海马体积和准海马体葡萄糖代谢预测了整体认知,命名和执行功能的变化.

结论:

  • 基线"A" (粉样蛋白) 和"N" (神经退行) 成像特征预测SCD的纵向认知变化.
  • 这些成像生物标志物是监测SCD进展的关键.
  • 在两年内,SCD患者经历了加速的执行功能下降.