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Related Concept Videos

Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

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Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH...
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Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

4
Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
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Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

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Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor,...
5
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

4
Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
4
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

4
Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence...
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Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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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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Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
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Thyroid dysfunction and cardiovascular disease.

Heba Alwan1,2, Ola Hysaj1,3, Baris Gencer1,4

  • 1Institute of Primary Health Care (BIHAM), University of Bern, Bern 3012, Switzerland.

European Heart Journal
|April 17, 2026
PubMed
Summary
This summary is machine-generated.

Thyroid dysfunction impacts cardiovascular health, causing issues like arrhythmias and high blood pressure. This review summarizes thyroid disease

Keywords:
Cardiovascular diseaseCardiovascular riskLevothyroxineSubclinical thyroid dysfunctionThyroid dysfunction

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Area of Science:

  • Cardiology
  • Endocrinology
  • Molecular Medicine

Background:

  • Thyroid hormones are crucial for cardiovascular system regulation.
  • Thyroid dysfunction (hypothyroidism, hyperthyroidism) is common and linked to cardiovascular issues like dyslipidemia, hypertension, endothelial dysfunction, cardiac dysfunction, and arrhythmias.

Purpose of the Study:

  • To summarize current knowledge on the thyroid dysfunction-cardiovascular health relationship.
  • To focus on the molecular and pathophysiological mechanisms linking thyroid dysfunction and cardiovascular disease.
  • To discuss levothyroxine's impact on cardiovascular outcomes in subclinical hypothyroidism.

Main Methods:

  • Review of current literature on thyroid dysfunction and cardiovascular health.
  • Discussion of evidence from omics and Mendelian randomization studies.
  • Overview of thyroid disease epidemiology and levothyroxine treatment effects.

Main Results:

  • Thyroid dysfunction is associated with diverse cardiovascular manifestations.
  • The TRUST trial showed a trend towards beneficial cardiovascular effects of levothyroxine in subclinical hypothyroidism, though underpowered.
  • Molecular and pathophysiological mechanisms are key to understanding the link.

Conclusions:

  • Thyroid dysfunction significantly impacts cardiovascular health through various mechanisms.
  • Further research is needed to clarify levothyroxine's role in subclinical hypothyroidism's cardiovascular outcomes.