Heart Attack, Cardiac Arrest Or Heart Failure – What’s the Difference? Although these terms sound similar, heart attack, cardiac arrest, and heart failure are three separate heart-related conditions with different causes and treatments. Knowing how these conditions differ can be life-saving, as timely action plays a critical role in outcomes. https://www.diigo.com/item/note/b2kvl/w3ya?k=f4140d405c19452d9b4a8d23499da818