An electrocardiogram is a non-invasive exam (i.e., it does not require opening the patient) that records the electrical activity of the heart.
10 minutes.
For this visit:
During a visit to the ambulatory clinic, self-adhesive electrodes connected to an electrocardiograph are placed on the chest. The heart's electrical activity is recorded for a few minutes during a painless procedure.
A cardiologist analyzes the electrocardiogram.