<unk>  is an abnormal pattern of breathing characterized by complete irregularity of breathing, with irregular pauses and increasing periods of apnea. As the breathing pattern deteriorates, it merges with agonal respiration.
Ataxic respiration
Agonal respiration
Pursed-lip breathing
Expiratory apnea
Hypoxic ventilatory response
Cheyne–Stokes respiration
Periodic breathing
Shallow breathing