Portal de Periódicos da CAPES

Cross-sectional echocardiography. I. Analysis of mathematic models for quantifying mass of the left ventricle in dogs.

1979; Lippincott Williams & Wilkins; Volume: 60; Issue: 5 Linguagem: Inglês

10.1161/01.cir.60.5.1104

1524-4539

H.L. Wyatt, Ming K. Heng, Samuel Meerbaum, J. D. Hestenes, Julio Cobo, Robert M. Davidson, E Corday,

Cardiovascular Disease and Adiposity

Cross-sectional echocardiography was used to quantify left ventricular mass noninvasively in 21 dogs. Short- and long-axis cross-sectional images of the left ventricle were reproducibly traced at endocardial and epicardial borders during stop-motion video-tape replay. We used area, length and diameter measurements to calculate left ventricular mass by seven mathematic models, including the standard formulas used with M-mode echocardiography and cineangiography. Calculated mass was compared with excised weight of the left ventricle by regression and percent error analyses. Formulas using short-axis areas and long-axis length resulted in higher correlation coefficients (0.94--0.95) and lower mean errors (6--7%) than for standard formulas. Since short-axis areas account for regional left ventricular irregularities, noninvasive quantification of left ventricular mass by cross-sectional echocardiography in dogs is most accurate with formulas using short-axis areas.