Why the study?
Does mitral valve replacement improve clinical outcomes in a dog with congenital mitral dysplasia?
Does mitral valve replacement improve clinical outcomes in a dog with congenital mitral dysplasia?
Mitral valve replacement with a bioprosthetic valve can be successfully performed in a dog with congenital mitral dysplasia, leading to long-term clinical recovery.
Single-case success leaves open whether mitral valve replacement improves outcomes in canine congenital mitral dysplasia; controlled studies needed.
A 10-month-old entire male bull terrier was presented with a history of collapse on exercise. Clinical examination, electrocardiography, radiography and echocardiography all supported a diagnosis of mitral valve dysplasia. There was no evidence of congestive heart failure. Surgical intervention consisted of open resection of the dysplastic mitral valve and its replacement with a bioprosthetic valve. The procedure was performed through a median sternotomy and the dog was placed on to full cardiopulmonary bypass. Total cardiopulmonary bypass time was 70 minutes. A full recovery was made and at the time of writing (17 months postoperatively) the dog is clincally normal requiring no medication.
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White et al. (1995) studied this question.
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