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://medium.com/@linda.wockhardthospitals/heart-attack-cardiac-arrest-or-heart-failure-whats-the-difference-ad30355a5da7