Mitochondrial Complex I Deficiency Nuclear Type 12 C4746984
A genetic disorder impairing energy production in cells by affecting the first complex of the mitochondrial respiratory chain. It can affect multiple organs and often presents in infancy. Treatment focuses on symptom management and metabolic support.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Hypertrophic cardiomyopathy
Developmental delay
(developmental)Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Lactic acidosis
(metabolic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
EPI-743 (Vatiquinone)
An investigational para-benzoquinone that enhances glutathione metabolism and reduces oxidative stress in mitochondria. May protect against further mitochondrial damage.
Cardiac Function Surveillance
Regular echocardiograms and ECG monitoring to detect cardiomyopathy, which is a known complication of mitochondrial complex I deficiency. Early detection allows for timely intervention.
Additional treatment options
Leigh Syndrome-Style Dietary Management
Modified diet emphasizing glucose management and avoiding fasting periods. May include complex carbohydrates and scheduled feeding intervals to prevent catabolism.
dietaryAcetyl-L-Carnitine
The acetylated form of carnitine that crosses the blood-brain barrier more readily. May support both peripheral and central nervous system mitochondrial function.
complementaryEnvironmental Stress Reduction
Avoidance of environmental toxins, medications that impair mitochondrial function, and extreme temperatures that may stress metabolic reserves.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Mitochondrial Complex I Deficiency Nuclear Type 12 C4746984?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy