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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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Updated: Jan 7, 2026

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

Maria Sevilla-García1,2, Federico Ramírez2,3, Fernando Maestú2,3,4

  • 1Technical University of Madrid, Madrid, Madrid, Spain.

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。

大脑结构随着年龄的增长而变化,即使在健康的个体中也是如此. 关键的解剖学测量和扩散指标,如分数异构 (FA) 的下降,而轴向扩散率 (AD) 和辐射扩散率 (RD) 的增加,表明衰老.

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科学领域:

  • 神经成像是一种神经成像.
  • 老年学是一门学科.
  • 大脑解剖学 大脑解剖学

背景情况:

  • 健康衰老涉及大脑的结构和功能变化,影响认知.
  • 区分正常衰老和神经退行对于健康策略至关重要.
  • 大脑的可塑性是衰老期间认知功能的一个关键因素.

研究的目的:

  • 为了研究大脑解剖学和结构连接的与年龄相关的变化.
  • 为了将特定的MRI衍生的指标与健康成年人的时间年龄相关联.

主要方法:

  • 分析了278名年龄在50-82岁之间的健康成年人的MRI数据.
  • 使用FreeSurfer提取的皮质和皮质下大脑测量 (例如,海马体积,灰质体积,皮质厚度).
  • 使用扩散张力成像 (DTI) 度量 (FA,NoS,AD,RD) 通过MRtrix3.3评估结构连接.

主要成果:

  • 在所有解剖学大脑测量中观察到与年龄相关的显著下降.
  • 分数异构性 (FA) 随着年龄的增长显著下降.
  • 轴扩散率 (AD) 和辐射扩散率 (RD) 随着年龄的增长而显著增加.

结论:

  • 老化的大脑经历了显著的解剖和结构变化,即使没有病理.
  • 这些发现突出了与健康衰老相关的规范性大脑变化.
  • 了解这些变化对于开发有针对性的衰老干预措施至关重要.