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Double-chambered Right Ventricle with Intact Ventricular Septum in a Maltese Dog  

Kang, Jong-Il (Choonghyun Animal Medical Center)
Lee, Seung-Gon (Choonghyun Animal Medical Center)
Publication Information
Journal of Veterinary Clinics / v.31, no.5, 2014 , pp. 403-406 More about this Journal
Abstract
A 6-year-old female Maltese (body weight, 3.1 kg) without clinical signs was referred for further evaluation of the cause of cardiac murmur. Thoracic radiography revealed right-sided cardiomegaly. Echocardiography showed marked hypertrophic remodeling of the right ventricular free wall and an anomalous muscular bundle and fibrous nodule near the subinfundibular portion of the right ventricular outflow tract (RVOT), indicating a double-chambered right ventricle (DCRV). The turbulent flow from the anomalous muscular bundle to the main pulmonary artery was 4.6 m/sec, in addition to the tricuspid valvular regurgitation of 4.4 m/sec and main pulmonary artery flow of 1.1 m/sec. The dog is receiving atenolol (0.5 mg/kg) to minimize the deleterious cardiac effects of the high afterload, even though she remains asymptomatic. This report describes a case of DCRV, a rare congenital heart disease in dogs in South Korea.
Keywords
double chambered right ventricle; pulmonic stenosis; congenital heart disease; anomalous muscular bundle; tricuspid regurgitation;
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