EKG or ECG are both acronyms of the word electrocardiogram. An electrocardiogram records the electronic impulses in your heart. This way you can be checked for a murmur, possible heart attack or stroke. Viewing and studying a chart that shows all the different readings for each one can give you an idea of what the electronic impulses are like for each. A chart will even show the impulses in a normal heart. Learning about what all an EKG does is important in the health field.