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Congenital Aortic Valvular Insufficiency Caused by Abnormal Valvular Structures in a Labrador Retriever Dog  

Moon, Hyeong-Sun (Section of Small Animal Internal Medicine, School of Veterinary Medicine, Kangwon National University)
Lee, Seung-Gon (Section of Small Animal Internal Medicine, School of Veterinary Medicine, Kangwon National University)
Lee, Sang-Eun (Section of Small Animal Internal Medicine, School of Veterinary Medicine, Kangwon National University)
Hyun, Chang-Baig (Section of Small Animal Internal Medicine, School of Veterinary Medicine, Kangwon National University)
Publication Information
Journal of Veterinary Clinics / v.24, no.2, 2007 , pp. 233-237 More about this Journal
Abstract
A 10-month-old intact male Labrador Retriever dog was referred with the primary complaint of exercise intolerance, especially after vigorous exercise. Physical examination revealed split S1 and grade III/VI diastolic regurgitant murmur at the left apex and base, respectively. ECG finding was normal sinus rhythm at rest, but supraventricular tachycardia with bundle branch blocks after exercise. Thoracic radiography revealed dilated ascending aorta with normal range of cardiac silhouette (VHS 10.2). Echocardiography revealed abnormal valvular structures just above the aortic valvular cusps causing aortic regurgitation with a reduction of left ventricular ejection fraction (LVEF). Based on those findings, the case was diagnosed as congenital aortic regurgitation caused by abnormal valvular structures. The dog was managed with diltiazem and exercise restriction. This is a rare case of aortic deformity in dogs.
Keywords
Labrador Retriever; dog; aortic valvular deformity; aortic insufficiency;
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