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Related Concept Videos

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...
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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...

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Related Experiment Video

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In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
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A novel fully automated method for mitral regurgitant orifice area quantification.

Michela Moraldo1, Corinna Bergamini, Anura S N Malaweera

  • 1International Centre for Circulatory Health, National Heart and Lung Institute, Imperial College, 59-61 North Wharf Road, London W21LA, UK. michela.moraldo@gmail.com

International Journal of Cardiology
|January 6, 2012
PubMed
Summary

A new automated algorithm, AQURO, accurately quantifies mitral regurgitation's regurgitant orifice area (EROA) using echocardiography. This method improves reproducibility and reduces analysis time compared to the manual proximal isovelocity surface area (PISA) technique.

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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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Published on: July 9, 2010

Area of Science:

  • Cardiovascular Imaging
  • Echocardiography
  • Medical Device Technology

Background:

  • Quantifying effective regurgitant orifice area (EROA) in mitral regurgitation (MR) is challenging with current clinical methods.
  • The proximal isovelocity surface area (PISA) method requires manual identification of the mitral valve orifice, limiting automation.
  • A novel, fully automated algorithm named AQURO directly calculates EROA from echocardiographic colour M-mode data.

Purpose of the Study:

  • To introduce and evaluate the AQURO algorithm for automated EROA quantification in MR.
  • To compare the reproducibility and agreement of AQURO with the conventional PISA method.

Main Methods:

  • Twenty patients with MR underwent EROA measurements using both PISA and AQURO.
  • PISA analysis involved three blinded observers manually measuring EROA from video loops.
  • AQURO automatically processed colour M-mode datasets, analyzing the velocity field to derive EROA without manual input.

Main Results:

  • AQURO demonstrated superior reproducibility (Intraclass Correlation Coefficient of 0.97) compared to PISA (0.80-0.83).
  • Agreement between replicate AQURO measurements (Standard Deviation of Difference: 5-7 mm²) was significantly better than PISA (17-21 mm²).

Conclusions:

  • AQURO eliminates the need for manual orifice identification, reducing measurement variability.
  • The automated AQURO method offers enhanced consistency and reduced analysis time for EROA quantification.
  • AQURO represents a simple and effective advancement for EROA assessment using standard echocardiographic equipment.