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- W1900386681 abstract "A 58-yr-old man with hypothyroidism and sleep apnea syndrome was studied to determine the cause of the nocturnal obstructive apnea and oxygen desaturation. Control studies showed free thyroxine (T4) concentration of 0.7 ng/dl (normal, 0.8 to 2.3 ng/dl), and thyroid-stimulating hormone of 32 microIU/ml (normal, less than 12 microIU/ml). Weight, pulmonary function, arterial blood gases, minute ventilation to carbon dioxide production ratio (VE/VCO2), and the ventilatory response to exercise (delta VE/delta VCO2) were normal. Episodes of obstructive apnea (4 per hour during non-REM (NREM) and 10 per hour during REM) and oxygen desaturation (9 per hour during NREM and 11 per hour during REM) were common during sleep. Oxygen saturation ranged between 72 and 99% and 70 and 97% during NREM and REM sleep, respectively. Medroxyprogesterone acetate (MPA) therapy for 4 wk caused a reduction in awake PaCO2 (38 to 33 mm Hg), and an increase in VE/VCO2 (17%), mouth occlusion pressure (50%), and AVE/VCO2 (23%). During sleep, apneas were completely eliminated and only one episode of oxygen desaturation occurred. L-thyroxine therapy for 2 months after a placebo period caused an awake isocapnic hyperpnea with no change in PaCO2 and VE/VCO2 despite a 23% increase in VE. Mouth occlusion pressure increased 37% but delta VE/delta VCO2 was unchanged. Obstructive apnea and oxygen desaturation during sleep were completely eliminated with L-thyroxine. The patient noted completed relief of symptoms with both MPA and L-thyroxine. We concluded that the sleep apnea syndrome was the presenting manifestation of hypothyroidism in this patient and was solely responsible for his symptoms and disability." @default.
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- W1900386681 date "1981-09-01" @default.
- W1900386681 modified "2023-09-23" @default.
- W1900386681 title "Disordered breathing during sleep in hypothyroidism." @default.
- W1900386681 doi "https://doi.org/10.1164/arrd.1981.124.3.325" @default.
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