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相关概念视频

Disorders of Hemostasis01:24

Disorders of Hemostasis

904
Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
904
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

696
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
696
Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

5.9K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
5.9K
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

7.6K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
7.6K
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

523
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
523
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

6.2K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
6.2K

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相关实验视频

Updated: Jul 1, 2025

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
04:37

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

Published on: May 23, 2025

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患有阿尔斯特罗姆综合征的患者的持续性原血栓状况

Nihit Shah1, Zeina Abu Orabi1, Adrian T Warfield2,3

  • 1Department of Cardiology, Queen Elizabeth Hospital, Birmingham, United Kingdom.

JACC. Case reports
|March 11, 2024
PubMed
概括

阿尔斯特罗姆综合征患者可能会出现前血栓状况,增加凝血风险. 这种案例研究是第一个记录阿尔斯特罗姆综合征中这种持久的原血栓环境的案例研究.

关键词:
阿尔斯特罗姆综合征是什么意思在CRTD中,它是最重要的.在 LV 血栓中.持续的原血栓状况.

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Deep Vein Thrombosis Induced by Stasis in Mice Monitored by High Frequency Ultrasonography
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科学领域:

  • 心脏病学 心脏病学
  • 遗传学 遗传学 是一个
  • 病理学 病理学 病理学

背景情况:

  • 阿尔斯特罗姆综合征是一种罕见的遗传性疾病,其特点是肥胖,胰岛素抵抗,以及渐进的感觉神经听力损失和视力损失.
  • 心血管并发症是阿尔斯特罗姆综合征发病率和死亡率的重要原因.
  • 前血栓状况,即导致血栓形成的条件,在阿尔斯特伦综合征中以前没有被描述过.

研究的目的:

  • 报道了一位患有阿尔斯特罗姆综合征的患者中出现前血栓状况的新发现.
  • 为了突出与阿尔斯特罗姆综合征相关的潜在心血管风险.

主要方法:

  • 分析了一名确诊患有阿尔斯特罗姆综合征的患者的尸检结果.
  • 组织病理学检查的重点是识别出原血栓状况的证据.

主要成果:

  • 尸检揭示了大量证据表明前血栓状况.
  • 这一发现与患者突然心脏病死亡有关.

结论:

  • 这一案例是阿尔斯特罗姆综合征中持续存在的原血栓环境的首例.
  • 这些发现表明,前血栓状况可能是阿尔斯特罗姆综合征的未被认可的并发症,导致心血管事件.