Essential EKG (FREE BONUS INCLUDED) The Complete Guide To Ekg Interpretation - Learn Everything You Need To Know About Rhythms, Arrhythmia And Basic Cardiac Dysrhythmias! The electrocardiogram (EKG) is a recording of the electrical activity of the heart over a period of time using electrodes that are placed on the body. Whatever your nursing specialty, mastering the EKG is a key skill every nurse needs to acquire in order to provide the best care...