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Related Concept Videos

Heart Valves01:16

Heart Valves

13.4K
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
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Layers of the Heart Wall01:15

Layers of the Heart Wall

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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.
The myocardium, the thickest layer, consists of cardiac muscle cells interconnected by intercalated discs and crisscrossing connective tissue fibers. These muscle fibers contract...
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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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Related Experiment Video

Updated: Mar 24, 2026

Combining 3D-Printing and Electrospinning to Manufacture Biomimetic Heart Valve Leaflets
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Combining 3D-Printing and Electrospinning to Manufacture Biomimetic Heart Valve Leaflets

Published on: March 23, 2022

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[Heart valve and myocardial tissue engineering].

Serghei Cebotari1, Igor Tudorache, Tobias Schilling

  • 1Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Strasse 1, Hannover, Germany. cebotari.serghei@mh-hannover.de

Herz
|July 16, 2010
PubMed
Summary

Tissue engineering offers promising alternatives for cardiac reconstruction, developing biocompatible heart valves and myocardial tissue. These advanced grafts aim for long-term durability and growth, addressing limitations of current treatments for heart disease.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Cardiovascular Engineering

Context:

  • Congenital and acquired heart diseases severely impact cardiac function, necessitating graft materials for tissue and valve replacement.
  • Current grafts are non-vital, trigger immune responses, calcify, degenerate, and lack growth capacity, requiring re-operation in pediatric patients.
  • Tissue engineering presents novel solutions for cardiac reconstruction, utilizing scaffolds for biocompatible, durable, and growing tissue replacements.

Purpose:

  • To review current cell sources and matrices for heart valve tissue engineering.
  • To discuss myocardial tissue engineering strategies for repairing and regenerating cardiac muscle.
  • To highlight the importance of vascularization in cardiovascular tissue engineering.

Summary:

  • Heart valve tissue engineering uses myofibroblasts/endothelial cells on scaffolds in bioreactors, showing promising durability and growth in limited clinical studies.
  • Myocardial tissue engineering aims to repair/regenerate cardiac tissue for conditions like ischemic cardiomyopathies and congenital heart defects.
  • Key challenges include identifying suitable human cell sources, large-scale expansion, scaffold development, and ensuring vascularization for functional tissue constructs.

Impact:

  • Tissue engineering provides potential for autologous, biocompatible, and growing cardiac grafts, overcoming limitations of current treatments.
  • This field offers hope for improved pediatric cardiac care, reducing the need for re-operations.
  • Further research is crucial for developing ideal tissue-engineered heart valves and myocardial substitutes for patients with advanced cardiac pathologies.