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Related Experiment Videos

[Value and limitations of methods for measuring left ventricular mass]

A Hagège1, M Desnos, N Mirochnik

  • 1Service de cardiologie, hôpital Boucicaut, Paris.

Archives Des Maladies Du Coeur Et Des Vaisseaux
|April 1, 1995
PubMed
Summary

M-mode echocardiography is inaccurate for measuring left ventricular mass in deformed hearts. Ultrafast CT offers accurate and reproducible left ventricular mass measurements, even in cardiomyopathies.

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Area of Science:

  • Cardiology
  • Medical Imaging

Background:

  • M-mode echocardiography for left ventricular mass (LVM) calculation relies on assumptions limiting accuracy in asymmetric hypertrophy.
  • Standard echocardiography exhibits significant error (SEE 30-40g, 10-15%) and inter-examination variability, hindering precise LVM tracking.
  • Two-dimensional echocardiography LVM formulas lack validation in cardiomyopathies.

Purpose of the Study:

  • To evaluate the accuracy and reproducibility of different imaging modalities for left ventricular mass measurement.
  • To compare echocardiography, MRI, and ultrafast CT in assessing left ventricular mass, particularly in complex cardiac conditions.

Main Methods:

  • Review of M-mode and 2D echocardiography limitations in LVM assessment.
  • Analysis of MRI validation studies for LVM measurement in normal and ischemic hearts.

Related Experiment Videos

  • Evaluation of ultrafast CT performance for LVM quantification in vitro and in vivo, including cardiomyopathies.

    • Main Results:

    • M-mode echocardiography shows poor accuracy with asymmetric hypertrophy.
    • MRI provides validated LVM measurements (r > 0.97, SEE < 8g) but requires long acquisition times.
    • Ultrafast CT demonstrates low SEE (6%) and excellent reproducibility (c=4-8%) for LVM, comparable to normal subjects and validated in cardiomyopathies.

    Conclusions:

    • Traditional echocardiographic methods for LVM are unreliable in specific cardiac pathologies.
    • Ultrafast CT is a highly accurate and reproducible imaging technique for quantifying left ventricular mass, even in complex cardiomyopathies.
    • The limitations of echocardiography have driven the adoption of MRI and CT for precise LVM assessment.