An echocardiogram ("echo") is an ultrasound test that uses high frequency sound waves (non-radioactive) for viewing the heart. It is a safe and painless procedure that helps doctors diagnose heart problems.
Pictures of the child's heart can be viewed on a small monitor while the procedure is being performed. It is a non-invasive test (no probes or needles) and everything is done from the outside of the body.
An echocardiogram is similar to a sonogram many women have had before a child was born; however, the echocardiogram focuses specifically on the heart and blood vessels around the heart.