Determination of left ventricular volume by two-dimensional echocardiography: comparison with magnetic resonance...

Area of Science:

• Cardiology
• Medical Imaging
• Echocardiography

Background:

• Accurate assessment of left ventricular (LV) volume is crucial for cardiovascular diagnosis.
• Traditional echocardiographic methods may face limitations in precision and accuracy.
• Magnetic resonance imaging (MRI) is often considered the reference standard for LV volume quantification.

Purpose of the Study:

• To evaluate a novel two-dimensional (2D) echocardiographic delineation method for determining left ventricular volume.
• To compare the accuracy of this new echocardiographic technique against magnetic resonance imaging (MRI).
• To assess the reproducibility and potential advantages of the new echocardiographic method.

Main Methods:

• A newly developed 2D echocardiographic delineation method was used to measure LV volumes in 12 healthy volunteers.
• Measurements included left ventricular end-diastolic volume (LVEDV) and left ventricular end-systolic volume (LVESV).
• Left ventricular ejection fraction (LVEF) was also calculated and compared with MRI reference values.

Main Results:

• Echocardiographically determined LVEDV was 123 ± 12 ml versus 121 ± 12 ml by MRI.
• Echocardiographically determined LVESV was 41 ± 7 ml versus 37 ± 6 ml by MRI.
• Echocardiographically determined LVEF was 67 ± 4% versus 70 ± 5% by MRI, with no statistical differences observed for any parameter.

Conclusions:

• The novel 2D echocardiographic delineation method accurately quantifies left ventricular volume in healthy individuals.
• The method demonstrated minimal interstudy and inter-observer variability, suggesting high reproducibility.
• Advantages include a dynamic display for precise edge-detection and easy correction, enhancing accuracy even in cases of poor echogenicity.