Heart Emergencies Explained: Heart Attack, Cardiac Arrest & Heart Failure Although these terms sound similar, heart attack, cardiac arrest, and heart failure are three separate heart-related conditions with different causes and treatments. Understanding these differences can help you react faster and seek the right medical care when every second matters. https://www.diigo.com/item/note/b2kvl/w3ya?k=f4140d405c19452d9b4a8d23499da818