Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Kidney Failure: Eat Right to Feel Right on Hemodialysis ?
    ### Response:
    Potassium is a mineral found in many foods, especially milk, fruits, and vegetables. It affects how steadily your heart beats. Healthy kidneys keep the right amount of potassium in the blood to keep the heart beating at a steady pace. Potassium levels can rise between dialysis sessions and affect your heartbeat.
    