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Related Concept Videos

Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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...

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Related Experiment Video

Updated: Jul 10, 2026

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
05:47

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro

Published on: May 10, 2021

Models of aortic valve calcification.

Marie Guerraty1, Emile R Mohler Iii

  • 1Vascular Medicine Section, Cardiovascular Division, Department of Medicine, University of Pennylvania School of Medicine, Philadelphia, PA, USA.

Journal of Investigative Medicine : the Official Publication of the American Federation for Clinical Research
|October 30, 2007
PubMed
Summary

Calcific aortic valve disease involves inflammation and cellular changes similar to atherosclerosis. Cell and animal models are crucial for studying this complex valvular condition.

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Related Experiment Videos

Last Updated: Jul 10, 2026

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
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Area of Science:

  • Cardiovascular Biology
  • Pathology
  • Biomedical Research

Background:

  • Aortic valve stenosis is an inflammatory process resembling atherosclerosis.
  • Key features include immune cell infiltration, endothelial dysfunction, and matrix deposition.
  • Myofibroblast transdifferentiation into osteoblast-like cells contributes to calcification.

Purpose of the Study:

  • To review available cell culture and animal models for studying calcific aortic valve disease.
  • To highlight the utility of these models in understanding disease mechanisms.
  • To provide a resource for researchers investigating valvular heart disease.

Main Methods:

  • Review of published literature on cell culture models of calcific aortic valve disease.
  • Review of published literature on animal models of calcific aortic valve disease.
  • Analysis of spontaneous and induced disease development in different species.

Main Results:

  • Cell culture models demonstrate myofibroblast-to-osteoblast transdifferentiation and calcific nodule formation.
  • Animal models, such as swine, exhibit spontaneous lesions, while others like rabbits and mice require hypercholesterolemia.
  • These models replicate key pathological features of human aortic valve stenosis.

Conclusions:

  • Cell culture and animal models are essential tools for investigating the pathogenesis of calcific aortic valve disease.
  • Models allow for the study of complex molecular and cellular interactions in vivo.
  • Further research using these models can advance therapeutic strategies for valvular heart disease.