The electrocardiogram (ECG) is a simple test that can be used to check the user’s rhythm and electrical activity of the heart. The electrocardiogram is able to automatically record biological signals produced by the cardiac muscle when the heart activating. This portable device is equipped with sensors that can be attached to the skin to detect the electrical signals produced by your heart each time it beats. It comes to be an effective support for doctors to see if the patients have abnormal health conditions.