What is cardiac arrest? What to know about why Damar Hamlin collapsed

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Dominique Mosbergen, The Wall Street Journal
A file photo of Buffalo Bills safety Damar Hamlin Premium
A file photo of Buffalo Bills safety Damar Hamlin

The player for the NFL’s Buffalo Bills collapsed in the middle of a game Monday night

After Damar Hamlin of the Buffalo Bills collapsed Monday night following a hit during a National Football League game against the Cincinnati Bengals, his team said the 24-year-old safety had suffered a cardiac arrest.