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Related Concept Videos

Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

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...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
Mitral Valve Prolapse III: Nursing Management01:19

Mitral Valve Prolapse III: Nursing Management

The nursing management of Mitral Valve Prolapse, or MVP, centers around patient education, symptom monitoring, and lifestyle modifications.Patient Education on MVP Diagnosis and Heredity: Nurses should provide comprehensive education about MVP, a condition where the mitral valve does not close appropriately during heartbeats. This education often includes the condition's pathophysiology, symptoms, and potential complications, like arrhythmias or mitral regurgitation. Though not fully...
Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular tachycardia.

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Related Experiment Video

Updated: Jun 12, 2026

Surgery and Sample Processing for Correlative Imaging of the Murine Pulmonary Valve
07:34

Surgery and Sample Processing for Correlative Imaging of the Murine Pulmonary Valve

Published on: August 5, 2021

Perinatal changes in mitral and aortic valve structure and composition.

Elizabeth H Stephens1, Allison D Post, Daniel R Laucirica

  • 1Department of Bioengineering, Rice University, Houston, TX, USA.

Pediatric and Developmental Pathology : the Official Journal of the Society for Pediatric Pathology and the Paediatric Pathology Society
|June 12, 2010
PubMed
Summary
This summary is machine-generated.

Birth dramatically alters heart valve mechanics. This study reveals significant compositional and structural changes in porcine aortic and mitral valves after birth, crucial for proper neonatal function and potentially implicated in congenital valve defects.

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Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
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Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice

Published on: February 14, 2017

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Last Updated: Jun 12, 2026

Surgery and Sample Processing for Correlative Imaging of the Murine Pulmonary Valve
07:34

Surgery and Sample Processing for Correlative Imaging of the Murine Pulmonary Valve

Published on: August 5, 2021

Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
12:12

Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice

Published on: February 14, 2017

Area of Science:

  • Cardiovascular Biology
  • Developmental Biology
  • Biomaterials Science

Background:

  • Heart valves are mechanosensitive and adapt to hemodynamic changes.
  • Perinatal period involves radical shifts in mechanical forces on heart valves.
  • Understanding valve remodeling is key to congenital heart disease research.

Purpose of the Study:

  • To investigate the compositional and structural remodeling of aortic and mitral valves (AVs, MVs) during the perinatal transition.
  • To compare valve matrix changes between fetal and neonatal porcine samples.
  • To correlate observed changes with altered hemodynamics at birth.

Main Methods:

  • Immunohistochemistry and Movat pentachrome staining were used.
  • Porcine aortic and mitral valves from the 3rd fetal trimester and 2-day-old neonates were analyzed.
  • Quantification of extracellular matrix components and collagen maturity was performed.

Main Results:

  • Aortic valves showed more significant changes than mitral valves post-birth.
  • Increased versican, elastin, and hyaluronan turnover were observed in neonatal AVs.
  • Decreased procollagen I, prolyl 4-hydroxylase, biglycan, and decorin suggest altered collagen synthesis.
  • Enhanced collagen maturity and increased collagen proportion were noted in neonatal AVs.

Conclusions:

  • Perinatal mechanical changes induce significant valve matrix remodeling.
  • These adaptations are vital for normal neonatal valve function.
  • Impaired perinatal matrix maturation may contribute to congenital valve disease pathophysiology.