Heart Attack First Aid Tips Please note that the source for these first aid instructions is the American Red Cross. Different signs, symptoms, and their causes may dictate different treatments. When in doubt, always call 911 first; the Fire and Emergency Medical Services call taker is prepared to give you instructions over the phone. Heart Attack: First Aid at a Glance Signs And Symptoms First Aid Two principal symptoms: Acute pain in chest, upper abdomen,     or down left arm Extreme shortness of breath All victims, call 911. Place victim in a comfortable position,     usually sitting up. If not breathing, give rescue breathing. Do not give liquids to unconscious victims.