News Damar Hamlin was treated with AED and CPR after cardiac arrest: Emergency response, explained January 3, 2023January 3, 2023Adrianna Rodriguez, USA TODAYComments Off on Damar Hamlin was treated with AED and CPR after cardiac arrest: Emergency response, explained Damar Hamlin's heart was shocked using an AED after his collapse. Here's what to know about emergency treatment for cardiac arrest.