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Myotonia may also present as an acquired condition. It may be associated with Cushing’s disease, and should your dog be diagnosed with that condition, treatment for it may resolve their symptoms of myotonia. Myotonia congenita is a rare condition causing muscle hypertrophy in dogs as well as noticeable stiffness upon rising to a standing ...
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- Summary
- Symptoms and Identification
- Affected Breeds
- Treatment
- Veterinary Cost
- Prevention
This rare disease, more aptly termed "myotonia congenita," affects the muscles by allowing the continuous contraction of muscle fibers. A painful, hereditary condition, myotonia is the result of chloride channel malformations in dogs, though a small number of cats have also been found to suffer it. The inability of the chloride channels (which allo...
Dogs with myotonia exhibit a stiff gait, experience trouble when rising, often suffer swollen tongues and may have difficulty swallowing. Young dogs start to show symptoms as early as of a few weeks of age. Muscle biopsy and electromyography (or "EMG," a study of electrical impulses in the muscles) have been shown to be helpful in diagnosing the pr...
The following breeds are predisposed: 1. Chow-chows 2. Staffordshire Terriers 3. Great Danes 4. Miniature Schnauzers
Procainamide, a drug used to treat heart arrhythmias, is an option that has been found to reduce the symptoms in many affected dogs. Apart from this approach, nothing has been found to be effective, including (to this date) treatment of the underlying disease in those who have "acquired" (non-congenital) forms of myotonia. Yet few dogs will ever be...
The cost of diagnosis is the largest expense owners will face. For muscle biopsies and neurologist-facilitated EMGs, the costs may range from the high hundreds to the low thousands of dollars. The cost of the drug itself is not usually considered a major factor.
Prevention of congenital myotonia is achieved primarily through testing of affected breeds and removing carriers or affected patients from the breeding pool through spay and neuter. A campaign is currently underway by the University of Pennsylvania to test all miniature Schnauzers intended for breeding to completely eliminate this problem in this b...
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What is myotonia congenita?
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Affected dogs present as puppies for prolonged muscle contractions, especially after resting. This leads to visibly appreciable muscle rigidity and a stiff, hopping gait. The tongue muscle is often affected as well, causing affected dogs to have a characteristic protruding tongue.
May 30, 2017 · Hyperkalemic periodic paralysis has 3 clinically distinct manifestations: (1) without myotonia, (2) with clinical or EMG myotonia, or (3) with paramyotonia congenita. In all 3 forms, the course of the paralytic attacks is the same, with episodes of flaccid muscle weakness. 53 , 54 Episodes typically begin in the first decade of life with ...
- M. Lowrie, L. Garosi
- 2017
Overview of Myotonia in DogsThis rare disease, more aptly termed “myotonia congenita,” affects the muscles by allowing the continuous contraction of muscle fibers. A painful, hereditary condition, myotonia is the result of chloride channel malformations in dogs, though a small number of cats have also been found to suffer it.
American Kennel Club Canine Health Foundation, Inc. 8051 Arco Corporate Dr. Suite 300 Raleigh, NC 27617 (888)-682-9696. Tax ID# 13-3813813
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder. The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles ( myotonia) and rigidity. [1]
