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Related Concept Videos

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 Regurgitation II: Clinical Features and Diagnostic Tests01:23

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
Mitral Regurgitation III: Medical Management01:25

Mitral Regurgitation III: Medical Management

Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
Mitral Regurgitation IV: Nursing Management01:28

Mitral Regurgitation IV: Nursing Management

Mitral regurgitation (MR) is a condition where the mitral valve does not close properly, leading to the backward flow of blood from the left ventricle into the left atrium during systole. This condition can arise from various causes, including rheumatic fever, infective endocarditis, or degenerative valve disease. Effective nursing management is crucial to optimizing patient outcomes and involves comprehensive assessment and targeted interventions.Comprehensive Patient AssessmentA detailed...
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 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 9, 2026

High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
11:50

High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

Published on: July 9, 2010

Left ventricular function in acute non-ischaemic mitral regurgitation.

R M Jeresaty1

  • 1University of Connecticut School of Medicine, Section of Cardiology, Saint Francis Hospital and Medical Center, Hartford 06105-1299.

European Heart Journal
|July 1, 1991
PubMed
Summary

Acute non-ischaemic mitral regurgitation (MR) presents unique challenges due to sudden volume overload. Early diagnosis and management, including afterload reduction, are crucial for preserving left ventricular function.

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High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
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Area of Science:

  • Cardiology
  • Cardiovascular Physiology

Background:

  • Acute non-ischaemic mitral regurgitation (MR) is increasingly recognized.
  • It differs significantly from chronic MR due to unprepared cardiac chambers.
  • Causes include ruptured chordae tendineae and infective endocarditis.

Purpose of the Study:

  • To elucidate the pathophysiology of acute non-ischaemic MR.
  • To differentiate its hemodynamic profile from chronic MR.
  • To highlight diagnostic and therapeutic considerations.

Main Methods:

  • Review of existing literature on acute MR.
  • Hemodynamic analysis of left ventricular (LV) and left atrial (LA) responses.
  • Comparison of acute versus chronic MR mechanisms.

Main Results:

  • Sudden volume overload in acute MR causes rapid LA pressure rise and pulmonary congestion.
  • LV function is initially preserved, with reduced wall tension leading to increased contractile shortening.
  • Early LV dilation without hypertrophy can precipitate failure, unlike chronic MR's adaptive changes.

Conclusions:

  • Acute MR's pathophysiology is distinct, characterized by immediate hemodynamic stress.
  • Prompt recognition and management are vital to prevent LV failure.
  • Understanding these differences guides effective treatment strategies.