Just to be clear, a "heart attack" commonly refers to a myocardial infarction (part of the hear tis being deprived of blood, generally due to an obstruction in

Just to be clear, a "heart attack" commonly refers to a myocardial infarction (part of the hear tis being deprived of blood, generally due to an obstruction in a coronary artery). Someone in the early stages of a heart attack will generally (but not always) experience chest pain/etc, anxiety, shortness of breath, etc. A heart attack can lead to cardiac arrest, where the heart stops beating effectively and the patient loses consciousness. Cardiac arrest is the scenario you're talking about (where CPR is indicated)