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Related Concept Videos

Structure of Cardiac Muscles01:13

Structure of Cardiac Muscles

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Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
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Cardiomyopathy I: Introduction and Classification01:25

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Specialized Characteristics of Cardiac Muscles01:27

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The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
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Pathophysiology of Cardiac Performance01:29

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Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Layers of the Heart Wall01:15

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The heart wall comprises three distinct layers: the epicardium, myocardium, and endocardium. The outermost layer, the epicardium, is the visceral layer of the serous pericardium, featuring a thin, transparent mesothelial surface and an inner layer of areolar connective tissue with fat deposits that increase with age.
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Related Experiment Video

Updated: Feb 17, 2026

Semi-automated Optical Heartbeat Analysis of Small Hearts
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Cardiomyokines from the heart.

Ayano Chiba1, Haruko Watanabe-Takano1, Takahiro Miyazaki1

  • 1Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565, Japan.

Cellular and Molecular Life Sciences : CMLS
|December 15, 2017
PubMed
Summary

The heart acts as an endocrine organ, secreting cardiomyocyte-derived peptides (cardiomyokines) that regulate distant organs. These cardiomyokines maintain cardiovascular homeostasis, systemic metabolism, and inflammation, protecting against organ damage.

Keywords:
CHGAET1FGF21FSTL1sPLA2

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Area of Science:

  • Cardiology
  • Endocrinology
  • Molecular Biology

Background:

  • The heart functions not only as a circulatory pump but also as an endocrine organ.
  • Cardiomyocytes secrete natriuretic peptides like atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP), which act as hormones on remote organs.

Purpose of the Study:

  • To review the current understanding of the heart's endocrine properties.
  • To focus on cardiomyocyte-derived peptides (cardiomyokines) that influence both the heart and remote organs.

Main Methods:

  • Literature review of scientific articles on cardiomyokines.
  • Analysis of the roles of cardiomyokines in regulating cardiovascular homeostasis, metabolism, and inflammation.

Main Results:

  • Cardiomyocytes secrete various peptides beyond natriuretic peptides.
  • While many cardiomyokines act locally (autocrine/paracrine), several target remote organs.
  • These peptides play crucial roles in maintaining cardiovascular homeostasis, systemic metabolism, and inflammation.

Conclusions:

  • The heart's endocrine function, through cardiomyokines, is vital for maintaining physiological conditions.
  • Cardiomyokines contribute to preventing organ damage under pathological conditions.
  • The heart's endocrine role extends beyond circulation control to systemic regulation.