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Related Concept Videos

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...
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...
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...
Pulmonary Embolism I: Introduction01:19

Pulmonary Embolism I: Introduction

A blood clot, or thrombus, is a semi-solid mass composed of fibrin, platelets, and red blood cells. When it forms within a vessel, it can obstruct blood flow, known as thrombosis. If part of the clot detaches, it becomes an embolus that can travel and block distant vessels. When this occurs in the pulmonary arteries, it causes a condition known as pulmonary embolism (PE).Origin and ImpactMost often, the embolus originates from a thrombus in the deep veins of the lower limbs, a condition called...
Pulmonary Embolism I: Introduction01:29

Pulmonary Embolism I: Introduction

Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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.

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Related Experiment Video

Updated: Jun 17, 2026

In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time
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Thrombotic risk factors: basic pathophysiology.

Ida Martinelli1, Paolo Bucciarelli, Pier Mannuccio Mannucci

  • 1A. Bianchi Bonomi Hemophilia and Thrombosis Center, Department of Internal Medicine and Medical Specialties, IRCCS Ospedale Maggiore Policlinico, Mangiagalli, Milan, Italy. martin@policlinico.mi.it

Critical Care Medicine
|January 20, 2010
PubMed
Summary
This summary is machine-generated.

Venous and arterial thrombosis, once thought distinct, share common risk factors like age and metabolic syndrome. Understanding these shared mechanisms is crucial for effective thrombosis prevention and treatment.

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Area of Science:

  • Cardiovascular Medicine
  • Hematology
  • Thrombosis Research

Background:

  • Traditionally, venous thrombosis (VT) and arterial thrombosis (AT) are linked to distinct causes: VT with stasis and hypercoagulability, AT with platelet reactivity and vessel wall damage.
  • Established risk factors for VT (cancer, surgery, estrogens) and AT (smoking, hypertension, diabetes, metabolic syndrome, hyperlipidemia) have been considered separate.
  • Recent research indicates a convergence, challenging the traditional dichotomy and highlighting shared risk factors for both conditions.

Purpose of the Study:

  • To review the mechanisms by which established risk factors contribute to venous or arterial thrombosis, or both.
  • To explore the shared risk factors between venous and arterial thrombosis, such as age and metabolic syndrome.
  • To provide a comprehensive understanding of the interconnectedness of thrombosis risk factors.

Main Methods:

  • Literature review of recent studies on thrombosis mechanisms and risk factors.
  • Analysis of shared risk factors between venous and arterial thrombosis.
  • Synthesis of current understanding regarding the pathophysiology of thrombosis.

Main Results:

  • Venous and arterial thrombosis share several risk factors, including advanced age and metabolic syndrome.
  • The distinction between risk factors for venous and arterial thrombosis is less clear than previously assumed.
  • Mechanisms underlying thrombosis are complex and often overlap between venous and arterial events.

Conclusions:

  • The traditional separation of venous and arterial thrombosis risk factors is being challenged by emerging evidence.
  • Shared risk factors suggest a closer pathophysiological link between venous and arterial thrombotic events.
  • Further research into shared mechanisms is essential for developing integrated strategies for thrombosis prevention and management.