Canine Dilated Cardiomyopathy Secondary to Hypothyroidism: Review of 3 Clinical Cases

Abstract

Canine dilated cardiomyopathy is characterized by ventricular systolic dysfunction with eccentric hypertrophy. Can be primary or secondary to other disorders such as hypothyroidism. Different cardiac changes, due to the inotropic and chronotropic alterations, can appear in these patients. Mainly affecting the left ventricle, although both ventricles may be affected. Electrocardiographic alterations may appear, as in the cases described, needing different therapeutic strategies for its control. Many times, we are able to achieve a complete resolution of the cardiac alterations once the hypothyroidism is stabilized, but this is not always possible, leaving permanent alterations.