Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Heart Attack ?
    ### Response:
    Your doctor will diagnose a heart attack based on your signs and symptoms, your medical and family histories, and test results.
                
Diagnostic Tests
                
EKG (Electrocardiogram)
                
An EKG is a simple, painless test that detects and records the heart's electrical activity.
    