Agonal respiration

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Agonal respiration, gasping respiration, or agonal breathing is a distinct and abnormal pattern of breathing and brainstem reflex characterized by gasping labored breathing and is accompanied by strange vocalizations and myoclonus. Possible causes include cerebral ischemia, hypoxia (inadequate oxygen supply to tissue), or anoxia (total oxygen depletion). Agonal breathing is a severe medical sign requiring immediate medical attention, as the condition generally progresses to complete apnea and preludes death. The duration of agonal respiration can range from two breaths to several hours of labored breathing. The term is sometimes inaccurately used to refer to labored, gasping breathing patterns accompanying organ failure, systemic inflammatory response syndrome, septic shock, and metabolic acidosis. End-of-life inability to tolerate secretions, known as the death rattle, is a different phenomenon.