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. Knowing how these conditions differ can be life-saving, as timely action plays a critical role in outcomes. At https://medium.com/@kaushal.wockhardthospitals/heart-attack-cardiac-arrest-or-heart-failure-whats-the-difference-28d340c065c8