ECG

A fetal echocardiogram is similar to a transthoracic echocardiogram; however, images of the fetal heart are obtained through the mother’s abdomen.  The optimal window for this test is between 20-24 weeks of pregnancy. This test frequently takes more time than the transthoracic echocardiogram because of fetal  movement and smaller heart size.  Not all fetal cardiac abnormalities can be identified early in the pregnancy and follow-up studies are often needed. This study can take up to an hour and a half. 

An exercise stress test is a study in which the patient walks on a treadmill while attached to an electrocardiogram.  The speed and incline of the treadmill are increased every few minutes throughout the study.  The patient’s blood pressures are recorded at regular intervals.  The patient is closely monitored throughout the test.  This test reveals information about exercise capacity, heart rate and blood pressure response to exercise, and any rhythm abnormalities.  An exercise stress test usually takes about 30-45 minutes depending upon the patient’s physical fitness.