procedure
electrocardiogram
also: ECG
a record of the changes in the HEART'S electrical potential made on an instrument called an electrocardiograph. The subject is connected to the equipment by leads on the chest and legs or arms. A normal trace has one wave for the activity of the atria and others relating to the ventricular beat. Abnormal heart activity is often indicated in the trace and it therefore forms a useful diagnostic aid.
Source: mediLexicon corpus · slug
electrocardiogram