A new method to quantify left ventricular mass by 2D echocardiography.

Area of Science:

• Cardiovascular Imaging
• Echocardiography
• Cardiac Structure Quantification

Background:

• Increased left ventricular mass (LVM) is a critical predictor of adverse cardiovascular events.
• Conventional echocardiographic methods for LVM assessment suffer from poor reproducibility and accuracy.
• Accurate LVM measurement is essential for risk stratification and patient management.

Purpose of the Study:

• To develop and validate a novel two-dimensional (2D) echocardiographic method for quantifying left ventricular mass (LVM).
• To compare the reproducibility and accuracy of the novel method against conventional one-dimensional (1D), other 2D, and three-dimensional (3D) echocardiographic techniques.
• To establish a simple, accurate, and reproducible method for LVM assessment in routine echocardiography.

Main Methods:

• A novel 2D method was developed by combining mean wall thickness (parasternal short axis view) with left ventricular end-diastolic volume (biplane model of discs).
• Eighty-five participants with diverse left ventricular geometries underwent echocardiography followed by cardiac magnetic resonance (CMR) as the reference standard.
• The novel 2D method was compared with conventional 1D methods (e.g., Devereux linear method), other 2D methods, and 3D echocardiography.

Main Results:

• The novel method demonstrated superior intra-examiner reproducibility (Coefficient of Variation [CV] 9% vs. 11-14%) and inter-examiner reproducibility (CV 9% vs. 10-20%) compared to conventional methods.
• Accuracy of the novel method was comparable to 3D echocardiography (Novel: 2 ± 50 g, 15% CV; 3D: 2 ± 51 g, 16% CV).
• The novel method showed significantly better accuracy than the Devereux 1D method (7 ± 76 g, 23% CV).

Conclusions:

• The novel 2D echocardiographic method provides a simple, highly reproducible, and accurate means of assessing left ventricular mass.
• This method surpasses the accuracy and reproducibility of conventional 1D echocardiographic techniques.
• As it utilizes standard echocardiographic protocols, the novel method requires no specialized training and can readily supplement modern echocardiographic reports.