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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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...
Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

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.
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

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 forms a...
Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

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...
Disorders of Hemostasis01:24

Disorders of Hemostasis

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.
Coagulation01:09

Coagulation

The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...

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Neutrophils can promote clotting via FXI and impact clot structure via neutrophil extracellular traps in a distinctive manner in vitro.

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Related Experiment Video

Updated: May 10, 2026

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States
07:09

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States

Published on: April 1, 2015

Fibrin(ogen) and thrombotic disease.

R A S Ariëns1

  • 1Division of Cardiovascular and Diabetes Research, Leeds Institute for Genetics, Health and Therapeutics, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, UK. r.a.s.ariens@leeds.ac.uk

Journal of Thrombosis and Haemostasis : JTH
|July 2, 2013
PubMed
Summary

Abnormal fibrin structure, characterized by high fiber density and resistance to breakdown, is linked to thrombosis risk. Further research into fibrin clot properties may reveal new diagnostic and therapeutic strategies for thrombotic diseases.

Keywords:
cardiovascular diseasesfibrinfibrinogenfibrinolysisthrombosis

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Last Updated: May 10, 2026

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States
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Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States

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Published on: February 27, 2026

Area of Science:

  • Hematology
  • Thrombosis Research
  • Molecular Biology

Background:

  • Fibrinogen is a key plasma protein forming fibrin clots.
  • Fibrinogen disorders (dys-, a-, hypo-fibrinogenemias) present with variable clinical outcomes.
  • Elevated fibrinogen levels and abnormal fibrin structure are associated with thrombosis risk.

Purpose of the Study:

  • To explore the link between fibrin structure and thrombosis.
  • To highlight fibrin structure measurements as a comprehensive assessment of hemostasis.
  • To discuss fibrinogen variations as a model for thrombosis-related structural changes.

Main Methods:

  • Review of existing literature on fibrinogen, fibrin structure, and thrombosis.
  • Discussion of fibrinogen splice variation (γ') as a model.
  • Emphasis on the potential of various analytical techniques (e.g., under flow, cell interactions, mechanical properties, nanoscale characterization).

Main Results:

  • High fiber density and increased resistance to fibrinolysis in fibrin clots correlate with thrombosis risk.
  • Fibrin structure analysis integrates thrombin generation, fibrinogen levels, and genetic factors.
  • Fibrin structure provides insights into clot mechanical strength.

Conclusions:

  • Fibrin structure is a critical factor in thrombotic disease.
  • Prospective studies are needed to confirm causal relationships.
  • Future research may lead to novel diagnostic and therapeutic approaches targeting fibrin structure.