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Case Report: Complex cardiac arrhythmia management in the ICU for an adolescent with Friedreich ataxia
Oluwatomini A Fashina1, Stephen J Gleich2,3, Derek N Opp4
1Department of Pediatrics Medicine, Mayo Clinic Children's, Rochester, MN, United States.
Insights
Friedreich
Area of Science:
- Cardiology
- Genetics
- Neurology
Background:
- Friedreich ataxia (FRDA) is a progressive neurodegenerative disorder.
- Scoliosis is a common manifestation of FRDA, complicating cardiac management.
- FRDA patients may experience hypertrophic cardiomyopathy and arrhythmias.
Observation:
- A 17-year-old male with FRDA and hypertrophic cardiomyopathy presented with refractory atrial flutter and heart failure.
- Severe scoliosis impeded successful cavotricuspid isthmus ablation.
- The patient developed cardiogenic shock, likely due to amiodarone-induced thyrotoxicosis, requiring ECMO.
Findings:
- Treatment of refractory arrhythmias in FRDA is complex, with potential for multisystem complications.
- Abnormal cardiac positioning due to scoliosis presents challenges for interventional procedures.
- Amiodarone-induced thyrotoxicosis is a potential complication requiring careful monitoring.
Implications:
- Intensivists must consider multisystem complications in FRDA patients with cardiac arrhythmias.
- Management requires a multidisciplinary approach, addressing both cardiac and neurological aspects.
- Genetic conditions like FRDA necessitate tailored treatment strategies for cardiovascular complications.
Background:
Friedreich ataxia (FRDA) is a progressive neurodegenerative disorder with specific clinical manifestations, such as scoliosis, which may impact the management of cardiac arrhythmias and heart failure.
Case Description:
A 17-year-old male with FRDA and hypertrophic cardiomyopathy presented with atrial flutter and resultant acute-on-chronic systolic and diastolic heart failure with reduced ejection fraction. The arrhythmias were refractory to medical management with adenosine and amiodarone. An attempted cavotricuspid isthmus ablation was unsuccessful due to abnormal cardiac positioning caused by severe scoliosis. Despite optimization with dofetilide and metoprolol, he was readmitted with recurrent atrial arrhythmias and cardiogenic shock, secondary to probable amiodarone-induced thyrotoxicosis, requiring extracorporeal membrane oxygenation. His clinical course involved multisystem complications, prolonged hospitalization, and disease progression, with no recovery in systolic function despite control of his arrhythmia burden.
Conclusion:
Intensivists should be cognizant of multisystem complications that can arise when treating refractory cardiac arrhythmias, especially in those with concomitant genetic conditions.
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