Heart attack vs cardiac arrest 🫀 These are two different emergencies that often get mixed up (and that you’ll definitely see on exams‼️) A heart attack can trigger a cardiac arrest, but they are not the same event. A myocardial infarction (heart attack) happens when blood flow to part of the heart is blocked, so that area doesn’t get enough oxygen. This is a circulation issue. A cardiac arrest is when the heart suddenly stops pumping efectively altogether because of an abnormal rhythm. This is