A heart can start beating irregularly or stop; people can lose consciousness and loved ones may not even notice because of agonal breathing, which are reflex breaths that occur when a person is in ...

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They may also be unconscious with slow or agonal respirations, diaphoretic and cyanotic. Opioid usage also causes pupils to constrict, but coingestion of another substance or anoxic brain injury ...

Breathe from your belly for at least five minutes every day. This kind of breathing, called diaphragmatic breathing, involves training and strengthening your diaphragm so it requires less effort to ...