Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Angina ?
    ### Response:
    The most important issues to address when you go to the doctor with chest pain are:
                
What's causing the chest pain
                
Whether you're having or are about to have a heart attack
                
Angina is a symptom of an underlying heart problem, usually coronary heart disease (CHD).
    