What is the normal amplitude of an EKG?

The normal amplitude of an EKG is typically around 10 mm, which represents the height of the waves recorded on the EKG strip. This amplitude is crucial as it correlates with the electrical activity of the heart; larger amplitudes can indicate conditions such as hypertrophy or other cardiac abnormalities.

The standard paper speed for an EKG is usually set to 25 mm per second, and the vertical axis is calibrated such that a height of 1 mm corresponds to 1 millivolt of electrical activity. Therefore, an amplitude of about 10 mm is indicative of a healthy heart's electrical activity under normal conditions. A standard amplitude allows healthcare providers to easily interpret the results and identify any irregularities.

Other amplitudes such as 5 mm, 15 mm, or 20 mm may not represent typical findings in a standard EKG, as too low an amplitude might suggest poor electrical conduction, while too high could indicate abnormalities needing further investigation. Therefore, understanding the normal amplitude helps in diagnosing and monitoring cardiac health effectively.