8354cbfd_diac_Arrest_and_a_Heart_Attack__Sudden_Cardiac_Arrest__SCA_
[0] Symptoms [Heart Attack] Warning signs of heart attack include a tightening feeling in the chest, a sore or numb left arm, lower back, neck, and/or jaw. Other signs include bad indigestion, a feeling that something heavy is sitting on your chest, and shortness of breath. [Sudden Cardiac Arrest (SCA)] 
Typically, there are no symptoms to SCA. Usually, the first indication of SCA is when the victim faints. The second sign is breathing cessation.
The Difference Between Sudden Cardiac Arrest and a Heart Attack
Sudden Cardiac Arrest (SCA)