A cardiogram test may refer to either an electrocardiogram or echocardiogram test. The electrocardiogram test is a medical test that checks for issues with the electrical activity in the heart, while the echocardiogram test is a test that uses an ultrasound to examine the heart.
The shorthand for the electrocardiogram is EKG. On the other hand, the shorthand for echocardiogram is ECG. Either of these tests is used to diagnose issues in the heart of a patient. These issues could include chest pain or abnormalities in the way that blood flows to and from the heart. These tests are not invasive procedures.