Subaortic stenosis and mitral dysplasia in three Black Russian Terrier puppies

A combined congenital heart defect of aortic stenosis and mitral dysplasia was diagnosed in three Black Russian Terrier puppies two months old. The aortic stenosis component included both fixed and dynamic obstructions. The fixed obstruction was subvalvularly located at the entrance to the left vent...

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Bibliographic Details
Published in:Veterinární medicína 2005-07, Vol.50 (7), p.321-326
Main Authors: Pikula, J., Pikulova, J., Bandouchova, H., Kohout, P., Najman, K., Tichy, F., Treml, F.
Format: Article
Language:English
Subjects:
Aorta
Aortic valve
Autopsies
Autopsy
congenital heart defects
Dysplasia
Heart
Heart valves
left ventricular outflow tract
malformation of atrioventricular valves
Mitral valve
Obstructions
Outflow
Regurgitation
Stenosis
Ventricle
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Summary:A combined congenital heart defect of aortic stenosis and mitral dysplasia was diagnosed in three Black Russian Terrier puppies two months old. The aortic stenosis component included both fixed and dynamic obstructions. The fixed obstruction was subvalvularly located at the entrance to the left ventricular outflow tract. The dynamic obstruction was caused by the septal leaflet of the mitral valve protruding into the left ventricular outflow tract. Mitral dysplasia resulted in mitral insufficiency leading to regurgitation through the mitral valve closer to the septal side. The maximum pressure gradient across the aortic valve amounting to 103 mmHg measured in one puppy was consistent with the most severe grade of stenosis. The diagnosis was confirmed by autopsy in all three puppies that were males and originated in one litter, so genetic influences are supposed.
ISSN:0375-8427
1805-9392
DOI:10.17221/5630-VETMED