Definition: An electrocardiogram is used to examine the electrical activity of a heartbeat. The right and left atria make the first wave called a “P wave” followed by a flat line when the electrical impulse travels to the ventricles. The right and left ventricles make the next wave referred to as the “QRS complex.” The final wave measured is the “T wave” and it represents the return to a resting state for the right and left ventricles.
Examples: This test is used to tell a physician how long it is taking the electrical wave to pass through your heart and from one part of the heart to another. Identifying if the electrical activity is normal, slow, fast, or irregular helps to identify parts of the heart that are overworked or too large.