An electrocardiogram is a recording of the heart's electrical activity. An echocardiogram uses ultrasound waves to record pictures of the structures inside the heart. Rarely, chest x-rays are ordered. All of these tests are painless, and usually none of them are needed. In fact, none of the tests can really tell the doctor what they heard, but they may help in making decisions.
Innocent heart murmurs never require any treatment.
You do not need to schedule follow-up visits to the doctor nor do you need to limit physical activity.