Mitochondrial myopathy

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Mitochondrial myopathy
Synonyms
Pronounce
Specialty	Neurology, Genetics
Symptoms	Muscle weakness, Exercise intolerance, Fatigue (medical), Hearing loss, Cardiomyopathy
Complications	N/A
Onset	Varies, often in childhood or adolescence
Duration	Long-term
Types	N/A
Causes	Mutations in mitochondrial DNA or nuclear DNA affecting mitochondrial function
Risks
Diagnosis	Muscle biopsy, Genetic testing, Blood tests
Differential diagnosis	Muscular dystrophy, Metabolic myopathy
Prevention	N/A
Treatment	Supportive care, Physical therapy, Coenzyme Q10 supplementation
Medication
Prognosis	Variable, depends on specific mutation and severity
Frequency	Rare
Deaths

Diagram of mitochondrial inheritance

Ragged red fibers under very high magnification

Mitochondrial myopathy is a type of myopathy associated with mitochondrial disease. It is a neuromuscular disease characterized by muscle weakness, exercise intolerance, and fatigue. It is caused by genetic mutations that affect the function of the mitochondria, the energy-producing structures within cells.

Symptoms

The symptoms of mitochondrial myopathy can vary greatly from person to person. They may include muscle weakness, fatigue, exercise intolerance, and difficulty with physical coordination. Some people may also experience heart problems, diabetes, and gastrointestinal disorders. In severe cases, the disease can lead to life-threatening complications such as heart failure and respiratory failure.

Causes

Mitochondrial myopathy is caused by genetic mutations that affect the function of the mitochondria. These mutations can be inherited from one or both parents, or they can occur spontaneously. The mutations cause the mitochondria to produce less energy than normal, which can lead to muscle weakness and other symptoms.

Diagnosis

The diagnosis of mitochondrial myopathy is often challenging due to the wide range of symptoms and the fact that many other conditions can cause similar symptoms. Doctors may use a combination of medical history, physical examination, and laboratory tests to diagnose the condition. These tests may include blood tests, muscle biopsy, and genetic testing.

Treatment

There is currently no cure for mitochondrial myopathy, but treatment can help manage symptoms and improve quality of life. Treatment options may include physical therapy, medication, and in some cases, surgery. Lifestyle changes such as regular exercise and a healthy diet can also help manage symptoms.

See also

• Mitochondrial disease
• Myopathy
• Genetic disorder

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