Heart attack during exercise

Yesterday, while running with an acquaintance, he suddenly collapsed. Occasionally, he seemed to be breathing, so I thought he would wake up soon, and rubbed his arms and legs. However, it didn't seem to be, so I gave him CPR with the help of those around him and sent him to the hospital by 119. However, he is still unconscious due to a ruptured aneurysm, and it's very difficult for me. Please pray for him. Everyone, take good care of your health during the changing seasons.