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Estimation of right ventricular free-wall mass using two-dimensional echocardiography
J J Joyce1, S Denslow, C H Kline
1The Children's Heart Center of South Carolina, Division of Pediatric Cardiology, Medical University of South Carolina, Charleston, SC 29413, USA.
Pediatric Cardiology
|July 17, 2001
Summary
A new echocardiographic method estimates right ventricular (RV) free-wall mass using a geometric model. This approach provides accurate RV mass measurements, aiding in diagnosing RV hypertrophy.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Echocardiography is widely used for left ventricular mass estimation.
- Currently, no established echocardiographic method exists for right ventricular (RV) free-wall mass.
- Accurate RV mass assessment is crucial for diagnosing and managing various cardiac conditions.
Purpose of the Study:
- To develop and validate a novel echocardiographic method for estimating RV free-wall mass.
- To test the hypothesis that a one-quarter prolate ellipsoid model can approximate RV mass using 2D echocardiography.
- To compare echocardiographic RV mass estimates with cardiac magnetic resonance imaging (MRI) standards.
Main Methods:
- Retrospective analysis of 39 patients with paired echocardiogram and MRI data.
- Development of RV mass estimation equations using a geometric model and linear regression.
- Prospective validation of the most accurate equation in a separate cohort of 88 subjects.
- Comparison of echocardiographic RV mass with MRI-derived RV mass.
Main Results:
- A derived echocardiographic equation demonstrated high accuracy: RV mass = 5.84 (apical four-chamber RV cavity planar area) (RV free-wall thickness) + 1.
- The equation showed a strong correlation (r=0.97) with MRI-derived RV mass.
- The method achieved a low standard error of the estimate (16.8%) and high predictive values for RV hypertrophy (95% positive, 88% negative).
Conclusions:
- Two-dimensional echocardiography, utilizing a one-quarter prolate ellipsoid shell model, can reliably estimate RV free-wall mass.
- This novel method offers a non-invasive and accessible tool for assessing RV mass.
- The findings have significant implications for the clinical evaluation of RV diseases.
