Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Coronary Heart Disease ?
    ### Response:
    Espaol
                
Coronary heart disease (CHD) is a disease in which a waxy substance called plaque builds up inside the coronary arteries. These arteries supply oxygen-rich blood to your heart muscle.
                
When plaque builds up in the arteries, the condition is called atherosclerosis.
    