| http://www.w3.org/ns/prov#value | - Central sleep apnea, which is caused by congestive heart failure, stroke, brain damage, drugs, and other problems that weaken signals from the brain to the diaphragm, may respond to CPAP, but it usually requires bilevel positive airway pressure, or BPAP, which produces higher pressure during inhalation and lower pressure during exhalation.
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