Volume: 55 Issue: 4
Year: 2024, Page: 734-738, Doi: https://doi.org/10.51966/jvas.2024.55.4.734-738
Received: Aug. 15, 2024 Accepted: Oct. 21, 2024 Published: Dec. 31, 2024
Dilated cardiomyopathy, the second most common canine acquired heart disease, is one of the leading cause
morbidity and mortality in middle to old aged large breed dogs. The cases presented with signs suggestive of cardiac
diseases were screened for DCM with the aid of standard B mode and one dimentional M-mode echocardiography.
Totally eight confirmed cases of DCM were selected for the present study and subjected to modified Simpson’s method
of discs for LV volume measurement and biplanar EF. All the parameters under study were repeated in six healthy control
dogs also. The data was analysed statistically by paired t-test. The results showed a statistically significant increase
in LV EDVI and ESVI and significant reduction in EF BP, compared to control. This study demonstrated that the twodimensional
modified Simpson’s method of discs as a superior alternative to M-mode measurements for assessing left
ventricular (LV) volume. Since, M-mode relied on a one-dimensional approach based on LV geometry, which might lead
to inaccuracies, especially in cases of LV dyssynchrony in diseased heart. In contrast, the Simpson’s method accurately
captures the complex three-dimensional shape of the LV by summing elliptical discs, providing a more precise assessment
of LV volume. This improved accuracy is essential for diagnosing the chamber enlargement and volume and managing
conditions like DCM, making the 2D modified Simpson’s method the preferred choice in veterinary cardiology.
Keywords: Dilated cardiomyopathy, Simpson’s method of discs, Simpson’s rule, echocardiography, end-diastolic volume, end systolic volume
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© 2024 Athira et al. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0
International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in
any medium, provided the original author and source are credited.
Athira, S., Sindhu, K.R., Unny, N.M., Ambily, V.R. and Soumya, R. 2024. Modified Simpson’s method of disc in
the diagnosis of dilated cardiomyopathy in dogs.
J. Vet. Anim. Sci. 55 (4):734-738