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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.
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Two factors primarily cause thromboembolic conditions.
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Introduction to Hemostasis01:05

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Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
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The Thyroid Gland01:23

The Thyroid Gland

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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
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Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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Thyroid Disorders and Hemostasis.

Laura P B Elbers1, Alessandro Squizzato2, Victor E A Gerdes1

  • 1Department of Internal Medicine, Medical Center Slotervaart, Amsterdam, The Netherlands.

Seminars in Thrombosis and Hemostasis
|July 26, 2018
PubMed
Summary
This summary is machine-generated.

Thyroid hormone levels significantly impact blood clotting. Low levels increase bleeding risk (hypocoagulable state), while high levels raise thrombosis risk (hypercoagulable state).

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Area of Science:

  • Endocrinology
  • Hematology
  • Cardiology

Background:

  • Thyroid hormones influence hemostasis.
  • Imbalances in thyroid hormones can lead to abnormal blood clotting.
  • Thyroid dysfunction affects cardiovascular health, indirectly impacting coagulation.

Purpose of the Study:

  • To review the effects of thyroid hormone levels on clinical hemostasis.
  • To describe the relationship between hypothyroidism, hyperthyroidism, and coagulation.
  • To explore the impact of thyroid disease on thrombotic and bleeding risks.

Main Methods:

  • Narrative review of existing literature.
  • Analysis of clinical end points related to thyroid hormone levels.
  • Examination of indirect effects of thyroid hormone on hemostasis.

Main Results:

  • Hypothyroidism is linked to a hypocoagulable state and increased bleeding risk.
  • Hyperthyroidism is associated with a hypercoagulable state and increased venous thrombosis risk.
  • Hyperthyroidism increases atrial fibrillation and flutter, raising cerebral arterial thrombosis risk; goiter can cause venous thrombosis via compression.

Conclusions:

  • Thyroid hormone levels critically modulate coagulation.
  • Both hypothyroidism and hyperthyroidism present distinct risks for bleeding and thrombosis.
  • Understanding these relationships is vital for managing patients with thyroid dysfunction.