<unk>  (also known as periodic breathing) is an abnormal pattern of breathing characterized by periods of breathing with gradually increasing and decreasing tidal volume interspersed with the brain to compensate quickly for changing serum partial pressure of oxygen and carbon dioxide.
Cheyne-Stokes respiration
Ataxic respiration
Horror vacui
Bronchial hyperresponsiveness
Anaerobic respiration
CO₂ retention
Hypokinesia
Agonal respiration