Key result
Left atrial dimension indexed to aortic diameter from 2-dimensional echocardiography is not interchangeable with M-mode echocardiography (short-axis mean bias -0.13; 95% LOA -0.42 to 0.17).
Why the study?
Are indices of left atrial size obtained from 2-dimensional echocardiography interchangeable with those from M-mode echocardiography in cats?
Population
37 cats (17 healthy cats and 20 cats with hypertrophic cardiomyopathy)
Comparison
2-dimensional echocardiography for left atrial… vs M-mode echocardiography
Design
Preclinical
Authors
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Clinicians should not interchange LA/Ao ratios from 2D and M-mode echocardiography in cats; leaves open need for method-specific reference standards in research.
Cross-Sectional (n=37)
Are indices of left atrial size obtained from 2-dimensional echocardiography interchangeable with those from M-mode echocardiography in cats?
Mean Difference: -0.13 (95% CI -0.42–0.17)
Ratios of left atrial size and aortic diameter obtained from 2-dimensional and M-mode echocardiography in cats are not interchangeable.
Abbott et al. (2006) conducted a cross-sectional in Hypertrophic cardiomyopathy (n=37). 2-dimensional echocardiography (2DE) vs. M-mode echocardiography was evaluated on Agreement between 2D short-axis left atrial dimension indexed to aortic diameter and the analogous M-mode index (Mean bias -0.13, 95% CI -0.42 to 0.17). Left atrial dimension indexed to aortic diameter from 2-dimensional echocardiography is not interchangeable with M-mode echocardiography (short-axis mean bias -0.13; 95% LOA -0.42 to 0.17).
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