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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

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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
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Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

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The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
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Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

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Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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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...
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Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

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Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
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Coagulation01:06

Coagulation

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients
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COVID-19 and Hypercoagulability: A Review.

Asim Kichloo1,2, Kirk Dettloff2, Michael Aljadah3

  • 1St. Mary's of Saginaw Hospital, Saginaw, MI, USA.

Clinical and Applied Thrombosis/Hemostasis : Official Journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis
|October 19, 2020
PubMed
Summary
This summary is machine-generated.

Thrombotic complications in COVID-19 are linked to a hypercoagulable state. Understanding the pathophysiology and targeting specific pathways may improve outcomes for patients with coronavirus disease 2019.

Keywords:
coagulopathyembolismvenous thromboembolism

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Area of Science:

  • Cardiovascular Medicine
  • Infectious Diseases
  • Pathophysiology

Background:

  • Thrombotic complications are a significant concern in coronavirus disease (COVID-19), particularly in critically ill patients.
  • COVID-19 is associated with a hypercoagulable state, but the underlying pathophysiology remains incompletely understood.

Purpose of the Study:

  • To review the proposed pathophysiologic mechanisms contributing to thrombotic complications in COVID-19.
  • To discuss current and potential treatment strategies for these thrombotic complications.

Main Methods:

  • Literature review of existing studies on COVID-19 and thrombosis.
  • Analysis of proposed mechanisms including immune response, endothelial injury, coagulation activation, and fibrinolysis shutdown.

Main Results:

  • COVID-19 pathogenesis involves immune response, endothelial cell injury, and activation of coagulation via tissue factor.
  • Impaired fibrinolysis also contributes to the hypercoagulable state observed in COVID-19 patients.

Conclusions:

  • Effective treatments targeting the identified pathophysiologic pathways are crucial for improving clinical outcomes.
  • Addressing thrombotic complications may decrease overall mortality in patients with COVID-19.