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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

Xuefeng Ma1, Bing Zhang1, Futao 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
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概括
此摘要是机器生成的。

主观认知衰退 (SCD) 患者表现出神经血管合 (NVC) 和空间导航受损,与临床前阿尔茨海默病 (AD) 有关. 这种大脑NVC脱可能解释SCD个体的导航缺陷.

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科学领域:

  • 神经科学是一个神经科学.
  • 医疗成像医学成像
  • 阿尔茨海默氏症疾病研究研究

背景情况:

  • 主观认知衰退 (SCD) 代表了临床前阿尔茨海默病 (AD) 的高风险组.
  • 神经血管合 (NVC),神经元活动和脑血流 (CBF) 之间的关系,为神经退行性疾病提供了洞察力.
  • 空间导航障碍是SCD的早期指标,但其与超高场MRI评估的NVC变化之间的联系仍然不清楚.

研究的目的:

  • 研究SCD患者的NVC变化及其与空间导航功能的关联.
  • 使用先进的5.0TMRI技术,包括动脉旋转标记 (ASL) 和多回声功能MRI (fMRI),用于高分辨率成像.

主要方法:

  • 招募了30名正常对照 (NC) 和29名SCD个体进行全面评估.
  • 使用ASL测量CBF,使用fMRI分析脑活动 (ALFF,fALFF).
  • 组之间的NVC (CBF/ALFF,CBF/fALFF比率) 的比较,以及与空间导航,认知表现和等离子体生物标志物相关的发现.

主要成果:

  • SCD个体表现出减少的NVC和较差的空间导航性能.
  • 在SCD组中,在特定的大脑区域观察到明显较低的CBF和CBF/ALFF,CBF/fALFF比率.
  • NVC比率,等离子体生物标志物和空间导航性能显示出显著的相关性,图像和导航数据的结合实现了SCD的高分类准确性.

结论:

  • SCD群体表现出受损的NVC和空间导航缺陷,显着相互关联.
  • 大脑NVC脱被提出为SCD中空间导航障碍的潜在神经病理机制.