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Central sleep apnea in hypothyroidism
The American Review of Respiratory Disease
|April 1, 1983
Summary
Hypothyroidism can cause central sleep apnea (CSA) due to respiratory control issues. Treatment with L-thyroxine resolved CSA in one patient, highlighting the importance of considering hypothyroidism in CSA diagnosis.
Area of Science:
- Endocrinology
- Pulmonology
- Sleep Medicine
Background:
- Hypothyroidism is a known risk factor for sleep-related breathing disorders.
- Previous literature suggests hypothyroidism may cause obstructive sleep apnea (OSA) via airway narrowing or ventilatory control abnormalities.
Observation:
- A 45-year-old male presented with central sleep apnea syndrome.
- The patient exhibited blunted ventilatory and occlusion pressure responses to hypoxia and normal hypercapnia responsiveness, indicating respiratory control center dysfunction.
Findings:
- L-thyroxine therapy normalized thyroid hormone levels (euthyroid state).
- Following treatment, the patient's central sleep apnea resolved.
- Respiratory control normalized, with restored hypoxic responsiveness and doubled hypercapnia response.
Implications:
- This case highlights the direct link between hypothyroidism and central sleep apnea.
- Hypothyroidism should be considered in the differential diagnosis of patients with central sleep apnea.
- Effective management of hypothyroidism can resolve central sleep apnea and improve respiratory control.