The American Heart Association updates recommendations for cardiac arrest, choking and overdose response, plus an unexpected ...
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This One Symptom Could Warn of Cardiac Arrest in 24 Hours

Research suggests that telltale symptoms may appear before cardiac arrest, and knowing how to recognize them can be lifesaving.
When these airways become constricted, the chest may feel tight or congested, and a wheeze can often be heard. Other sounds to look out for, discussed below.