How does a cpap help central sleep apnea?

Multiple benefits: High quality evidence shows that positive airway pressure (i.e. CPAP) reduces the freq of respiratory events during sleep, decreases daytime sleepiness, improve systemic blood pressure and blood glucose control. Also shown to improved subjective and objective sleepiness, quality of life, cognitive function, and depression. Possibly decreases nocturnal arrhythmia however limited data.

Gold standard: Regardless, central or obstructive sleep apnea, CPAP machine provides a positive flow of air into the nasal passages to keep the airway open.