Abstract
Describe a case of stroke-like episodes and refractory status epilepticus diagnosed with primary CoQ10 deficiency-4 (COQ10D4) using whole-exome sequencing in the intensive care unit (ICU), with treatment implications. A patient presented to the emergency department with 1 month of progressively worsening focal motor status epilepticus and stroke-like imaging abnormalities. Multiple seizure medications, ketogenic diet, and elective intubation for anesthetic drips failed to achieve sustained seizure freedom. Genetic testing was pursued for prognostic information and identified potential treatment. Whole-exome sequencing revealed compound heterozygous variants of COQ8A, including 1 allele not previously described as pathogenic. The patient's history, imaging, and genetic testing supported a diagnosis of COQ10D4. High-dose coenzyme Q10 supplementation was started with gradual clinical improvement. Whole-exome sequencing is a fast and cost-effective means to diagnose rare neurologic disease in critically ill patients and can uncover treatment options. While primarily used in the neonatal ICU, appropriately selected adult patients may also benefit.
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