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/b2kov/ph48?k=44c88be0fe13ca23aff6a657fc9e76e2