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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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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

Futao Chen1, Bing Zhang1,2, Qian Chen1

  • 1Department of Radiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
概括
此摘要是机器生成的。

主观认知衰退 (SCD) 的动态功能连接 (DFC) 改变与空间导航缺陷有关. 超高场MRI揭示了这些DFC变化,为早期阿尔茨海默病检测提供了潜在的生物标志物.

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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
  • 阿尔茨海默氏症疾病研究研究

背景情况:

  • 主观认知衰退 (SCD) 是阿尔茨海默病 (AD) 干预的关键早期阶段.
  • SCD与动态功能连接 (DFC) 和空间导航功能障碍的改变有关.
  • 在SCD中,DFC与空间导航之间的关系需要进一步研究.

研究的目的:

  • 通过使用超高空间时间分辨率fMRI (5.0T) 调查SCD中的DFC特征.
  • 探索DFC变化,空间导航和SCD患者的认知表现之间的关系.

主要方法:

  • 招募了49名正常对照 (NC) 和46名SCD患者.
  • 进行了全面的神经心理评估,空间导航测试和5.0T fMRI.
  • 识别DFC状态使用滑动窗口和k-means集群,计算时间属性.
  • 评估了DFC时间性质,空间导航和认知表现之间的相关性.

主要成果:

  • 确定了四个不同的DFC状态.
  • SCD组显示了改变的DFC状态过渡,在低连接状态 (状态3) 中,窗口更多,停留时间更长.
  • 在DFC时间性质,空间导航功能和认知表现之间发现了显著的关联.

结论:

  • 5.0T超高时空分辨率的fMRI有效检测SCD中的DFC变化.
  • 在SCD中变化的DFC时间性质可能是空间导航障碍的基础.
  • DFC的变化作为潜在的神经成像生物标志物用于临床前AD检测.