An Electrocardiograph Machine is an instrument for recording the changes of electrical potential occurring during the heartbeat used especially in diagnosing abnormalities of heart action. An electrocardiogram records the electrical signals in your heart. It's a common test used to detect heart problems and monitor the heart's status in many situations. The machines are typically used on patients who have suffered heart damage, are at risk for heart disease, or experience symptoms that may be caused by any number of heart-related problems. These machines perform electrocardiograms, also called ECGs or EKGs. The Electrocardiograph Machine is made available in various types.