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Related Concept Videos

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 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...
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...
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...
Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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: Jun 1, 2026

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

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Published on: May 10, 2021

Calcific aortic valve stenosis: methods, models, and mechanisms.

Jordan D Miller1, Robert M Weiss, Donald D Heistad

  • 1Department of Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA. miller.jordan@mayo.edu

Circulation Research
|May 28, 2011
PubMed
Summary
This summary is machine-generated.

Calcific aortic valve stenosis (CAVS) is now understood as an active, regulated process, not just degeneration. Research highlights the roles of bone-forming cells and fibrosis in this common aging disease.

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Last Updated: Jun 1, 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

A Rabbit Aortic Valve Stenosis Model Induced by Direct Balloon Injury
07:10

A Rabbit Aortic Valve Stenosis Model Induced by Direct Balloon Injury

Published on: March 31, 2023

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 Research
  • Translational Medicine
  • Pathology

Background:

  • Calcific aortic valve stenosis (CAVS) is a significant health concern in aging populations.
  • Traditionally viewed as degenerative, CAVS is now recognized as an actively regulated process.
  • The presence of osteoblast-like and osteoclast-like cells challenges previous understandings of CAVS.

Purpose of the Study:

  • To review key studies that have reshaped the understanding of CAVS.
  • To explore the mechanisms of valvular calcification and fibrosis in CAVS.
  • To identify promising future research directions for CAVS.

Main Methods:

  • Review of key human and animal studies.
  • Examination of mechanistic studies using mouse models of CAVS.
  • Utilizing high-resolution echocardiography and magnetic resonance imaging for intervention testing.

Main Results:

  • CAVS progression is actively regulated, involving ectopic osteogenesis and non-skeletal osteoblast-like cells.
  • Valvular fibrosis, alongside calcification, significantly contributes to cusp immobility.
  • Mouse models have facilitated mechanistic studies of CAVS.

Conclusions:

  • CAVS should be considered a fibrocalcific disease.
  • Active cellular processes, not just degeneration, drive CAVS.
  • Further research is needed to develop effective pharmacological and genetic interventions.