Key result
The right parasternal four-chamber view is feasible for assessing left ventricular longitudinal deformation in cats, but only endocardial longitudinal strain values agree sufficiently with the left apical four-chamber view to be used interchangeably.
Why the study?
The RP4Ch view is often more easily obtained than the LAP4Ch view in cats, but no studies had compared LV longitudinal strain and strain rate values using STE from different views.
Does the right parasternal four-chamber view agree with the left apical four-chamber view for assessing LV longitudinal strain and strain rate by 2D speckle tracking echocardiography in cats?
Population
50 cats including 31 healthy cats and 19 cats with different disease states
Comparison
RP4Ch view vs LAP4Ch view for LV longitudinal strain and strain rate
Design
Agreement and measurement variability study
Authors
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Caution advised substituting right parasternal for apical views beyond endocardial strain in cats; leaves open validation for other layers and species.
Observational (n=50)
No
Does the right parasternal four-chamber view agree with the left apical four-chamber view for assessing LV longitudinal strain and strain rate by 2D speckle tracking echocardiography in cats?
Effect estimate: Limits of agreement: -3.28 to 2.58 (95% CI -3.28 to 2.58)
In cats, the right parasternal four-chamber view is feasible for assessing LV longitudinal deformation by speckle tracking echocardiography, but only endocardial longitudinal strain values are interchangeable with the standard left apical four-chamber view.
Caivano et al. (2020) conducted an observational in Healthy and diseased cats (predominantly cardiomyopathy) (n=50). Right parasternal four-chamber (RP4Ch) view vs. Left apical four-chamber (LAP4Ch) view was evaluated on Agreement of left ventricular longitudinal strain between RP4Ch and LAP4Ch views (Limits of agreement: -3.28 to 2.58, 95% CI -3.28 to 2.58). The right parasternal four-chamber view is feasible for assessing left ventricular longitudinal deformation in cats, but only endocardial longitudinal strain values agree sufficiently with the left apical four-chamber view to be used interchangeably.
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