An electrocardiogram is a test that measures the electrical
activity of the heart. This includes the rate and regularity of
beats as well as the size and position of the chambers, any
damage to the heart, and effects of drugs or devices to regulate
the heart. Review Date: 6/1/2010 Reviewed By: Issam Mikati, MD,
Associate Professor of Medicine, Feinberg School of Medicine,
Director, Northwestern Clinic Echocardiography Lab, Northwestern
University, Chicago, IL. Review provided by VeriMed Healthcare
Network. Also reviewed by David Zieve, MD, MHA, Medical
Director, A.D.A.M., Inc.