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Related Concept Videos

Psychoneuroimmunology: Cardiovascular Disease01:27

Psychoneuroimmunology: Cardiovascular Disease

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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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Disturbances in Heart Rhythm01:28

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
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Mechanism of Cardiac Arrhythmias01:28

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Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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Arteries of the Head and Neck01:26

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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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Overview of the Heart01:07

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The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's...
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Anatomy of the Heart01:27

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The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
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Implantation of Electroencephalogram and Electrocardiogram Telemetry Devices in Neonatal Rabbit Kits
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Brain, heart, and sudden death.

Shahram Oveisgharan1, Fariborz Ghaffarpasand2, Peter Sörös3

  • 1Rush Alzheimer's Disease Center, Rush University of Medical Sciences, Chicago, IL, USA.

Current Journal of Neurology
|November 27, 2023
PubMed
Summary
This summary is machine-generated.

Sudden death (SD) causes are often unclear, even as heart disease declines. This study explores the brain

Keywords:
EpilepsyHeart FailureNervous System DiseasesPsychological StressStrokeSudden DeathTakotsubo Cardiomyopathy

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Area of Science:

  • Neuroscience and Cardiology
  • Sudden Death Pathophysiology

Background:

  • Coronary artery disease (CAD) rates have decreased, yet sudden death (SD) rates have not proportionally declined, indicating other contributing factors.
  • The etiology of SD remains undetermined in a significant number of cases, suggesting a need to broaden the scope beyond cardiac causes.
  • Current research predominantly focuses on cardiac mechanisms of SD, with limited attention to neurological factors or the interplay between brain and heart.

Purpose of the Study:

  • To review pathological findings in heart autopsies of SD victims, particularly those exposed to psychological stressors.
  • To summarize recent research on brain regions, such as the insula, implicated in SD.
  • To propose a unified perspective on SD risk factors, integrating both brain and heart contributions, and to explore prevention strategies.

Main Methods:

  • Review of pathological findings from heart autopsies in SD victims.
  • Summary of neuroimaging and neurological studies investigating brain involvement in SD.
  • Analysis of literature on neurological diseases, psychological stressors, and heart failure-related SD.

Main Results:

  • Pathological cardiac findings in SD victims following psychological stress are reviewed.
  • Emerging evidence links brain area dysfunction, including the insula, to SD.
  • The connection between neurological conditions, psychological stressors, heart failure, and SD is highlighted.

Conclusions:

  • A comprehensive understanding of SD requires considering both cardiac and neurological factors.
  • The brain plays a critical role in the pathophysiology of SD, often in conjunction with cardiac issues.
  • Future prevention strategies for SD should adopt a brain-heart integrated approach.