An electrocardiogram (EKG or ECG) is a test that checks for issues with the electrical activity of your heart. An EKG does the work of translation of the heart's electrical activity into line tracings on paper. The spikes and dips in the line tracings are known as waves. These waves are read by physicians and other health care providers to determineany heart problems.
An EKG measures the underlying rate and rhythm mechanism of the heart, the heart is placed in the chest, and patterns of abnormal electric activity that may lead to abnormal cardiac rhythm. Along with this, and EKG can show proof of increased thickness of the heart muscle, damage to various parts of the heart, and improper blood flow.