A 55-year-old man with acute myocardial infarction and no heart failure, had episodes of severe oxygen desaturation and apnea, while his hemodynamic parameters were stable. Sleep recordings revealed severe sleep apnea, and pulmonary function tests showed bronchial obstruction. Apnea and desaturation resolved on bilevel positive airway pressure. Patients with acute myocardial infarction who have apnea and hypoxemia without evident heart failure should be evaluated for sleep disorders.
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