Final answer:
The patient should lie still while the electrodes are placed on their chest and limbs.
Step-by-step explanation:
The correct statement by the patient that indicates understanding of the EKG procedure is: "I will lie still while the electrodes are placed on my chest and limbs." This statement shows that the patient understands the importance of remaining motionless during the placement of the electrodes, as any movement can interfere with the accuracy of the EKG reading. The other statements provided are incorrect. Fasting for 8 hours or 24 hours is not necessary before the EKG, and it is important for the patient to continue taking their medications as usual on the day of the EKG.