A heart attack is when one of the coronaries becomes blocked. The heart muscle is robbed of its vital blood supply and, if left untreated, will begin to die because it is not getting enough oxygen . cardiac arrest is when a person’s heart stops pumping blood around their body and they stop breathing normally. An arrest may be d2 an attack But every attack doesn't necssecarily lead to an arrest.

a heart attack is a circulation problem, cardiac arrest is an electrical problem