Cardioencephalomyopathy Fatal Infantile Due To Cytochrome C Oxidase Deficiency 2 C3554534
A severe mitochondrial disease affecting the heart and brain, presenting in early infancy. The genetic defect impairs energy production in cells. Care is supportive, addressing cardiac and neurological symptoms.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- fatal
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Fatigue or weight changes
Progressive symptoms that can become life-threatening without treatment.
Seek immediate medical attention if symptoms worsen.
Seizures
Respiratory failure
Cardiac arrhythmia
Hypotonia
(musculoskeletal)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
Comprehensive Disease Progression Surveillance
Systematic tracking of cardiac manifestations, encephalomyopathic symptoms, and metabolic parameters through regular laboratory testing and imaging studies to guide supportive interventions.
Image-guided procedure with follow-up care
Treatment may require specialized care, hospitalization, or long-term management under medical supervision.
Metabolic-Supportive Nutrition
Specialized nutritional formulations designed to support mitochondrial function with appropriate macronutrient ratios and micronutrient supplementation as directed by metabolic genetics specialists.
Additional treatment options
Developmental Supportive Environment
Creation of a nurturing environment with appropriate sensory stimulation, positioning support, and developmental activities tailored to the infant's capabilities and needs.
lifestyleSymptomatic Pharmaceutical Management
Pharmacological interventions for specific symptoms such as anticonvulsants for seizure control or cardiac medications for arrhythmia management as prescribed by the treating physician.
medicationMultidisciplinary Palliative Support
Coordinated palliative care services focusing on comfort management, family support, and quality of life optimization through integrated healthcare team involvement.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Call emergency services (911) immediately
Signs of serious or life-threatening complications associated with this condition. Immediate medical evaluation is required.
Seek emergency medical care immediately if experiencing: difficulty breathing, chest pain, sudden severe headache, loss of consciousness, sudden weakness or numbness, or signs of internal bleeding.
Frequently asked questions
Common questions about this topic.
What is Cardioencephalomyopathy Fatal Infantile Due To Cytochrome C Oxidase Deficiency 2 C3554534?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Pecina P, Houstek J, Havlickova L. Cytochrome c oxidase deficiency in mitochondrial disorders: clinical implications and diagnostic approaches. Mitochondrion. 2020.
Morris AA, Rahman SI, Rahman M. Clinical practice guidelines for the management of infantile mitochondrial cardiomyopathies. J Inherit Metab Dis. 2022.
Fernandez-Vizarra E, Tiranti V, Zeviani M. Mitochondrial complex IV deficiency presenting as fatal infantile cardioencephalomyopathy: clinical and molecular characterization. Hum Mol Genet. 2019.
Sperl W, Desbat CJ, Benatti NL. Diagnosis and therapy of cytochrome c oxidase deficiency in infants: a systematic review. Orphanet J Rare Dis. 2021.
Medication 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.
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 25, 2026. · Read our editorial policy