When someone's heart suddenly stops beating, it's a terrifying and life-threatening event. This usually happens due to cardiac arrest. CPR can help restart the heart, but that's just the first step. What happens next is critical for helping the person survive with the least possible brain damage or disabilities. This period after the heart restarts is known as post-cardiac arrest care. ACLS certification and Best ACLS renewal online can help healthcare teams be skilled and knowledgeable about post-cardiac arrest care.