How tall is a standardization mark on an EKG?

The standardization mark on an EKG is typically set at a height of 10 mm. This mark is used as a reference point to ensure that the amplitude of the EKG tracing is standardized, allowing for accurate assessment of the heart’s electrical activity. When the machine is calibrated correctly, a standardization pulse should create a wave that is exactly 10 mm tall, reflecting a specific voltage that helps in measuring other deflections on the EKG accurately. This standardization is vital in interpreting the EKG correctly, as variations in height can indicate potential issues with either the EKG machine or the patient’s cardiovascular condition.