Assessment of cardiac function by three-dimensional echocardiography compared with conventional noninvasive methods

Area of Science:

• Cardiology
• Medical Imaging
• Echocardiography

Background:

• Accurate, noninvasive serial quantification of left ventricular ejection fraction (LVEF) is crucial for managing heart disease patients.
• Equilibrium radionuclide angiography (ERNA) is a standard but has limitations.
• Echocardiography offers advantages like portability and lower cost but conventional methods suffer from geometric assumptions and subjective analysis.

Purpose of the Study:

• To develop and evaluate a novel three-dimensional echocardiography (3DE) method for LVEF determination.
• To compare the accuracy and reliability of 3DE against ERNA and conventional 2D echocardiographic techniques.

Main Methods:

• Fifty-one patients with suspected heart disease underwent LVEF assessment using ERNA and 3DE.
• 3DE utilized an interactive line-of-intersection display and a ventricular surface reconstruction algorithm.
• Conventional methods included quantitative 2D echocardiography (apical biplane summation-of-disks) and subjective visual estimation.

Main Results:

• 3DE demonstrated excellent correlation with ERNA for LVEF (r = .94–.97), with low standard error of the estimate (SEE) and narrow limits of agreement.
• 3DE showed twofold to threefold lower SEE and limits of agreement compared to all 2D echocardiographic techniques.
• Interobserver variability was significantly lower for 3DE (10.2%) versus 2D methods (26.1% quantitative, 33.3% visual).

Conclusions:

• 3DE provides LVEF determination results comparable to ERNA.
• 3DE significantly outperforms conventional 2D echocardiographic methods in accuracy and reproducibility.
• 3DE is a viable alternative for accurate serial quantification of left ventricular function.