Mitochondrial Complex I Deficiency Mitochondrial Type 1 C4746992
A rare mitochondrial disorder that disrupts energy production in cells. It can cause problems with muscles, heart function, and nervous system development. Treatment aims to manage symptoms and support affected organs.
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
Sudden weakness
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Lactic acidosis
(metabolic)Exercise intolerance
(musculoskeletal)Developmental delay
(neurological)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.
Riboflavin (Vitamin B2) Supplementation
High-dose riboflavin serves as a cofactor for complex I and may provide therapeutic benefit in mitochondrial complex I deficiency. This water-soluble vitamin is generally safe and may improve electron transfer efficiency.
Thiamine (Vitamin B1) Supplementation
Thiamine supports mitochondrial energy metabolism and may help reduce lactate accumulation in patients with complex I deficiency. B-vitamin supplementation is often used as complementary therapy.
Additional treatment options
Stress Avoidance Protocol
Reducing physical and emotional stress helps prevent metabolic decompensation episodes common in mitochondrial disorders. This includes avoiding fasting, managing infections promptly, and maintaining stable routines.
lifestyleCardiac and Neurological Surveillance
Regular cardiac evaluations and neurological assessments detect cardiomyopathy and other complications associated with mitochondrial complex I deficiency. Includes ECG, echocardiogram, and developmental monitoring for children.
monitoringAlpha-Lipoic Acid Supplementation
Alpha-lipoic acid acts as an antioxidant and supports mitochondrial function by helping regenerate other antioxidants. It may provide neuroprotective benefits and support overall cellular energy production.
complementaryWhen 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 Mitochondrial Type 1 C4746992?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Mitochondrial Complex I Deficiency Mitochondrial Type 1 C4746992. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy