Hypertrophic cardiomyopathy secondary to severe right and left ventricular outflow tract obstruction in a Maltese dog

Yoon, Won-Kyoung; Suh, Sang-Il; Oh, Yeon-Su; Hyun, Changbaig

doi:2015.55.3.209

Korean J Vet Res > Volume 55(3); 2015 > Article

Case report

Korean Journal of Veterinary Research 2015;55(3):209-211.
DOI: https://doi.org/10.14405/kjvr.2015.55.3.209 Published online September 22, 2015.

Hypertrophic cardiomyopathy secondary to severe right and left ventricular outflow tract obstruction in a Maltese dog

Won-Kyoung Yoon¹, Sang-Il Suh², Yeon-Su Oh³, Changbaig Hyun²

¹Guardian Angel Animal Hospital
²Section of Small Animal Internal Medicine, College of Veterinary Medicine, Kangwon National University
³Department of Veterinary Pathology, College of Veterinary Medicine, Kangwon National University

Abstract

An 8-year-old spayed female Maltese (2.5 kg of body weight) presented with the primary complaint of loud heart murmur and exercise intolerance. Diagnostic imaging revealed severe pulmonic stenosis (peak velocity 5.2 m/s) with right ventricular hypertrophy. The dog revisited after 2 years, at which time, diagnostic imaging revealed severe biventricular hypertrophy, dynamic left ventricular outflow tract obstruction, left atrial dilation and pulmonary hypertension with worsened pre-existing pulmonic stenosis. Postmortem investigation revealed hypertrophic cardiomyopathy and regional myocardial infarction. The case was diagnosed as hypertrophic cardiomyopathy secondary to severe right and left ventricular outflow tract obstruction.

Key Words: dog, dynamic obstruction, hypertrophic cardiomyopathy, pulmonic stenosis, ventricular outflow tract obstruction