I just want to confirm that I’m understanding the difference.
Cardiac Arrest: Sudden cessation of the heart.
Heart Failure: Condition where the heart does not pump enough blood therefore the body/organs don’t receive blood and/or oxygen and/or nutrients.
Heart Attack: Sudden death of the heart due to lack of blood.
So,
1) A Heart Attack is the result of Heart Failure?
2) Cardiac Arrest is another word for Heart Attack?
3) Heart Failure is the cause of Cardiac Arrest or Heart Attack?

Thank you!!