In which unit is normal EKG amplitude measured?

Normal EKG amplitude is measured in millivolts. The electrical signals generated by the heart, as recorded by an electrocardiogram (EKG), consist of tiny electrical changes. Since these voltages are relatively small, millivolts is the appropriate unit of measure used by healthcare professionals to describe the amplitude of these signals effectively.

Microvolts represents a smaller unit than millivolts and would not be suitable when discussing normal EKG readings, which generally fall into a range that is measured in millivolts. Decibels, used primarily for measuring sound intensity and expressing ratios, are not applicable to electrical signals in EKGs. Watts, which measure power, do not pertain to the amplitude of electrical signals in the context of EKG readings. Therefore, millivolts is the correct unit for expressing that aspect of EKG data.