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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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Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

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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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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,...
26
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

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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...
23
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

29
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...
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Cardiovascular Drugs: Classification based on Therapeutic Indications01:18

Cardiovascular Drugs: Classification based on Therapeutic Indications

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Cardiovascular diseases, encompassing a range of conditions, can significantly affect the heart's operations and the overall circulatory system. These conditions impair the heart's ability to pump blood, leading to a deficit in oxygen supply to crucial organs. Anomalies in the heart's electrical system, known as arrhythmias, can cause heartbeats to accelerate or slow down. Usually, heart rates increase during physical activity and decrease while resting or sleeping. However,...
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Author Spotlight: Integrating Ultrasound Imaging with Biochemical Markers for Thyroid Disease Diagnosis
05:41

Author Spotlight: Integrating Ultrasound Imaging with Biochemical Markers for Thyroid Disease Diagnosis

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Thyroid disease and the cardiovascular system.

Sara Danzi1, Irwin Klein2

  • 1Department of Biological Sciences and Geology, Queensborough Community College, 222-05 56th Avenue, Bayside, NY 11364, USA.

Endocrinology and Metabolism Clinics of North America
|June 4, 2014
PubMed
Summary
This summary is machine-generated.

Thyroid hormones like triiodothyronine (T3) significantly impact heart function. Monitoring T3 levels is crucial for diagnosing and treating cardiovascular conditions, especially in patients with compromised health.

Keywords:
Cardiac myocyteHeartHyperthyroidismHypothyroidismSubclinicalThyroid hormoneTriiodothyronine

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Area of Science:

  • Cardiology
  • Endocrinology
  • Molecular Biology

Background:

  • Thyroid hormones, particularly triiodothyronine (T3), exert profound influences on cardiovascular physiology.
  • Disruptions in thyroid hormone levels, including hypothyroidism, hyperthyroidism, subclinical thyroid disease, and low T3 syndrome, are linked to cardiac and cardiovascular abnormalities.

Purpose of the Study:

  • To elucidate the impact of thyroid hormone status on cardiac and cardiovascular function.
  • To highlight the importance of assessing thyroid hormone levels in the context of cardiovascular disease management.

Main Methods:

  • Review of existing literature on thyroid hormone effects on cardiac myocytes and vascular smooth muscle cells.
  • Analysis of genomic and nongenomic mechanisms involved in thyroid hormone action.
  • Consideration of thyroid hormone alterations in compromised health states like heart disease.

Main Results:

  • Thyroid hormone imbalances lead to diverse cardiac and cardiovascular dysfunctions.
  • Both genomic and nongenomic pathways mediate the effects of thyroid hormones on cardiovascular cells.
  • Altered thyroid hormone metabolism exacerbates cardiac and cardiovascular impairment in patients with existing heart conditions.

Conclusions:

  • Thyroid hormone status is a critical factor in cardiovascular health.
  • Assessing serum total T3 levels can aid in the diagnosis and treatment of cardiac disease.
  • Integrating thyroid hormone evaluation into cardiac patient care may improve outcomes.