Resolution of Periodic Breathing in a Child with Idiopathic Pulmonary Arterial Hypertension

Figure 2

(a) 3-minute polysomnographical recording showing the periodic breathing pattern. (b) Hypnogram from the entire night illustrating the sleep stages; W: wakefulness, R: REM, N1–N3: non-REM sleep (stage 1–3), SpO₂: oxygen saturation, and EtCO₂: end tidal carbon dioxide. Supplemental oxygen was added during the last third of the night.

(a)

(b)