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Related Concept Videos

Anatomy of the Heart01:27

Anatomy of the Heart

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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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Anatomy of the Heart01:20

Anatomy of the Heart

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The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
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Overview of the Heart01:07

Overview of the Heart

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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 structure...
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Conduction System of the Heart01:19

Conduction System of the Heart

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Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
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Conduction System of the Heart01:20

Conduction System of the Heart

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The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
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Chambers of the Heart01:16

Chambers of the Heart

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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
Deoxygenated blood from the body is received in the right...
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Related Experiment Video

Updated: Feb 11, 2026

A Rat Model of Pressure Overload Induced Moderate Remodeling and Systolic Dysfunction as Opposed to Overt Systolic Heart Failure
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Microcirculatory dysfunction in the heart and the brain.

Hernán Mejía-Rentería1, Jordi A Matias-Guiu2, Francesco Lauri1

  • 1Interventional Cardiology Unit, Cardiology Department, Hospital Clínico San Carlos, IDISSC and Universidad Complutense de Madrid, Madrid, Spain.

Minerva Cardioangiologica
|April 25, 2018
PubMed
Summary
This summary is machine-generated.

Coronary microcirculatory dysfunction (CMD) and cerebral small vessel disease share mechanisms. This review explores their links, impacting cardiac events, cognitive decline, and neurodegeneration.

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Area of Science:

  • Cardiovascular Medicine
  • Neurology
  • Vascular Biology

Background:

  • Coronary microcirculatory dysfunction (CMD) is a key factor in myocardial ischemia and affects coronary artery disease outcomes.
  • Cerebral small vessel disease, a form of brain microcirculatory dysfunction, is linked to cognitive decline and neurodegeneration.
  • Both conditions may share underlying pathophysiological mechanisms like endothelial dysfunction and vascular remodeling.

Purpose of the Study:

  • To discuss the mechanisms of microvascular dysfunction in the heart and brain.
  • To examine the clinical impact of these dysfunctions on cardiac events, cognitive decline, and neurodegenerative disorders.
  • To explore the potential link between cardiac and cerebral microcirculatory dysfunction.

Main Methods:

  • Literature review and synthesis of existing evidence.
  • Discussion of shared pathophysiological mechanisms.
  • Analysis of clinical implications and potential interconnections.

Main Results:

  • CMD and cerebral small vessel disease involve heterogeneous mechanisms.
  • Shared pathways include endothelial dysfunction, thrombosis, vascular remodeling, and capillary rarefaction.
  • Evidence suggests a potential link between cardiac and cerebral microvascular dysfunction.

Conclusions:

  • Understanding the shared mechanisms of CMD and cerebral small vessel disease is crucial.
  • This link may offer new insights into managing cardiac events, cognitive decline, and neurodegenerative diseases.
  • Further research is needed to fully elucidate the relationship between heart and brain microcirculation.