Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Heart Failure ?
    ### Response:
    Heart failure is a condition in which the heart can't pump enough blood to meet the body's needs. Heart failure does not mean that your heart has stopped or is about to stop working. It means that your heart is not able to pump blood the way it should. It can affect one or both sides of the heart.
    