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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

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An integrated approach to determine left atrial volume, mass and function in hypertrophic cardiomyopathy by

Ashraf M Anwar1, Osama I I Soliman, Attila Nemes

  • 1Department of Cardiology, Thoraxcenter, Erasmus Medical Center, Room Ba 304, Dr Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands.

The International Journal of Cardiovascular Imaging
|June 2, 2007
PubMed

Insights

Hypertrophic cardiomyopathy (HCM) is linked to larger left atrial (LA) size and enhanced LA pump function, particularly in the obstructive type. Obstructive HCM also shows impaired LA reservoir and conduit functions.

Area of Science:

  • Cardiology
  • Echocardiography
  • Cardiac Physiology

Background:

  • Hypertrophic cardiomyopathy (HCM) is a primary genetic heart muscle disease.
  • Left atrial (LA) remodeling and dysfunction are common in HCM.
  • Understanding LA function is crucial for assessing HCM severity and prognosis.

Purpose of the Study:

  • To assess left atrial (LA) volume, mass, and function in hypertrophic cardiomyopathy (HCM) patients using two-dimensional echocardiography.
  • To compare LA parameters between non-obstructive HCM, obstructive HCM, and healthy controls.
  • To investigate the impact of HCM on LA reservoir, conduit, and pump functions.

Main Methods:

  • Two-dimensional echocardiography was used to analyze LA parameters in 25 HCM patients (15 non-obstructive, 10 obstructive) and 25 controls.
  • Measurements included LA diameter (LAD), LA mass, and various LA volume and function indices (V max, V min, V pre-A, TA-SV, TA-EF, AA-SV, AA-EF, PA-SV, PA-EF, AEI, LA-KE).
  • Specific formulas were applied for calculating LA mass and volume.

Main Results:

  • HCM patients exhibited significantly higher LAD, LA mass, V max, V min, and V pre-A compared to controls.
  • Active atrial stroke volume (AA-SV) and LA kinetic energy (LA-KE) were significantly elevated in both HCM groups versus controls.
  • Obstructive HCM showed significantly higher LA-KE than non-obstructive HCM, and lower passive emptying fraction (PA-EF) and atrial expansion index (AEI) than controls.

Conclusions:

  • HCM is associated with increased left atrial (LA) size and augmented LA pump function, particularly in the obstructive subtype.
  • Obstructive HCM demonstrates impaired LA conduit and reservoir functions.
  • Echocardiographic assessment of LA parameters provides valuable insights into HCM pathophysiology.
Abstract

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