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Related Concept Videos

Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

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The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
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Regulation of Food Intake01:30

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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Psychoneuroimmunology: Cardiovascular Disease01:27

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Psychoneuroimmunology (PNI) is a multidisciplinary field that examines how psychological factors, particularly stress, interact with the immune system and impact physical health. Research in PNI has shown that chronic or traumatic stress can disrupt both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. These disruptions contribute to serious health conditions, including cardiovascular diseases.
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Hormonal Regulation of Blood Pressure01:17

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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
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Ghrelin and the Cardiovascular System.

Brian M Lilleness1, William H Frishman

  • 1From the *Department of Medicine, Boston University School of Medicine, Boston Medical Center, Boston, MA; and †Department of Medicine, New York Medical College, Westchester Medical Center, Valhalla, NY.

Cardiology in Review
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Summary

Ghrelin, a stomach-derived peptide, demonstrates significant cardioprotective effects. Further research is needed to fully understand its clinical role in cardiovascular diseases.

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Area of Science:

  • Endocrinology
  • Cardiology
  • Molecular Biology

Background:

  • Ghrelin is a peptide hormone primarily produced in the stomach.
  • It plays a key role in regulating appetite, metabolism, and growth hormone secretion.
  • Ghrelin signaling is implicated in cardiovascular function and disease.

Purpose of the Study:

  • To review the multifaceted roles of ghrelin in the cardiovascular system.
  • To highlight ghrelin's cardioprotective mechanisms and therapeutic potential.
  • To identify knowledge gaps regarding ghrelin's clinical significance in cardiovascular disease.

Main Methods:

  • Literature review of studies investigating ghrelin's cardiovascular effects.
  • Analysis of molecular pathways modulated by ghrelin in cardiac and vascular tissues.
  • Examination of preclinical and clinical data on ghrelin administration in cardiovascular conditions.

Main Results:

  • Ghrelin receptors are expressed in the heart and vasculature.
  • Ghrelin influences intracellular calcium, apoptosis, and oxidative stress.
  • Ghrelin administration improves cardiac function post-myocardial infarction and benefits heart failure and pulmonary hypertension.

Conclusions:

  • Ghrelin exhibits potent cardioprotective properties through various molecular mechanisms.
  • Exogenous ghrelin shows promise in treating cardiovascular diseases like heart failure and myocardial infarction.
  • More research is essential to elucidate ghrelin's full clinical impact on cardiovascular health.