Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Heart Palpitations ?
    ### Response:
    Palpitations (pal-pi-TA-shuns) are feelings that your heart is skipping a beat, fluttering, or beating too hard or too fast. You may have these feelings in your chest, throat, or neck. They can occur during activity or even when you're sitting still or lying down.
    