The echocardiogram is very safe. There are no known risks from the ultrasound waves. The exercise test is also safe. A small amount of risk does exist for any test that stresses the heart. Possible rare complications can include abnormal heart rhythms or a heart attack.
Experienced personnel are available to handle any emergency.
This information should not be considered specific medical advice and is not meant to replace professional medical services. Please speak to your physician regarding symptoms, diagnosis, treatment, etc.