central sleep apnea syndrome central sleep apnea due to periodic breathing https://github.com/monarch-initiative/mondo/issues/8957 SCTID:85721000119105 A sleep-related disorder characterized by cyclical breathing patterns where periods of shallow or absent breathing (apneas or hypopneas) alternate with periods of deeper breathing (hyperpnea). This cyclical pattern is caused by an instability in the body's respiratory control system, where the brain doesn't properly regulate breathing effort. ICD9:327.27 Cheyne–Stokes breathing central sleep apnea due to periodic breathing ICD9:786.09 MEDGEN:783212 MONDO:0024359 central sleep apnea with Cheyne–Stokes breathing UMLS:C3662057