This practical “how-to” manual for interpreting electrograms and understanding how they relate to the more easily understood/obtained electrocardiogram (ECG) is designed to be used in electrophysiology laboratories and during preparation for certification tests. Clear enough to be understood by the novice, this inexpensive paperback is suitable for use by nurses and cardiovascular technicians working in the electrophysiology laboratory, as well as physicians who are interested in practical aspects of electrophysiology. Written by an award-winning teacher, it offers short, succinct chapters with bullet-point summaries and review questions to aid retention.