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If a victim suffers a breathing emergency and is deprived of adequate oxygen, hypoxia will result. Hypoxia is a condition in which insufficient oxygen reaches the cells. Hypoxia may result from an obstructed airway, shock, inadequate breathing, drowning, strangulation, choking, suffocation, cardiac arrest, head trauma, carbon monoxide poisoning or anaphylactic shock. Signs and symptoms of hypoxia can include an increased heart rate, cyanosis (a condition that develops when tissues do not get eno