Ĭavaliers are the most affected breed by this disease. Dogs who experience SM due to CM are statistically older than those with CM only. This is called Syringomyelia.ĬM can occur without SM. This malformation leads to overcrowding of the brain and partial herniation of the cerebellum.Īs a result, compression of the brainstem and spinal cord leads to an accumulation of cerebrospinal fluid. Chiari-like MalformationĬM consists of a malformation of the skull and craniocervical vertebrae. This leads to obesity and other issues that increase the chances of premature death. Cavaliers who suffer from it have a low quality of life which, in time, transforms into a lack of movement. The two most common neurologic diseases of Cavalier King Charles Spaniels are Chiari-like Malformation (CM) and Syringomyelia (SM).ĬM and SM are not deadly in themselves. Symptoms of Neurologic Disease in Cavalier King Charles Spaniels The x-rays or ultrasound scans indicate changes in the shape of the heart.Ĭavaliers display symptoms of heart failure.Ĭavalier King Charles Spaniels with Mitral Valve Disease display various symptoms:Ģ. They are prone to the disease but don’t display any symptoms.Ĭavaliers have a heart murmur but no changes in X-rays or ultrasound scans. This stage indicates a predisposition for MVD. This table illustrates the four main stages of Mitral Valve Disease. The most severe symptoms appear during stage C, which is the one that precedes death. MVD has 4 evolution stages, ranging from A to C. As a result, the Cavalier breeding protocol doesn’t allow breeders to mate Cavaliers who have been diagnosed with MVD under the age of five. MVD in Cavaliers between 4 to 5 years old is highly heritable. Research indicates that as many as 90% of Cavaliers are affected by MVD when they reach 10 years old.
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