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Related Concept Videos

Heart Valves01:16

Heart Valves

10.5K
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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Mitral Stenosis III: Medical Management01:26

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Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
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Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

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IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
278

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Related Experiment Video

Updated: Dec 28, 2025

Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves
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A geometrically adaptable heart valve replacement.

Sophie C Hofferberth1, Mossab Y Saeed2, Lara Tomholt3,4

  • 1Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA. sophie.hofferberth@cardio.chboston.org pedro.delnido@cardio.chboston.org.

Science Translational Medicine
|February 21, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a novel biomimetic prosthetic heart valve that dynamically adapts to somatic growth, reducing the need for repeat surgeries in children with congenital heart valve disease.

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Area of Science:

  • Biomaterials Science
  • Cardiovascular Engineering
  • Pediatric Cardiology

Background:

  • Congenital heart valve disease necessitates early valve replacement.
  • Current prosthetic valves do not accommodate somatic growth, leading to repeat surgeries in pediatric patients.
  • A growth-accommodating prosthetic valve is crucial for improving long-term outcomes.

Purpose of the Study:

  • To develop and validate a biomimetic prosthetic valve capable of geometric adaptation to somatic growth.
  • To address the limitations of existing prosthetic valves in pediatric patients.
  • To offer a paradigm shift in treating congenital heart valve disease.

Main Methods:

  • Design of a balloon-expandable synthetic bileaflet valve analog inspired by human venous valves.
  • Benchtop testing to validate geometric adaptability and functionality.
  • In vivo survival studies in growing sheep to assess growth accommodation.

Main Results:

  • The biomimetic valve demonstrated geometric adaptability to dimensional and shape changes.
  • Benchtop and acute in vivo experiments confirmed design functionality.
  • In vivo studies in growing sheep showed successful accommodation of somatic growth through mechanical valve expansion.

Conclusions:

  • The developed prosthetic valve offers dynamic size adaptability, preserving unidirectional flow.
  • This biomimetic design represents a significant advancement in addressing the challenges of congenital heart valve disease in growing children.
  • The findings suggest a potential paradigm shift towards more sustainable prosthetic valve solutions.