Text, illustrations, and exercises are utilized in these five learning modules to instruct nurses, students, and other health care professionals in cardiac anatomy and functions and in fundamental electrocardiographic techniques. The first module, "Cardiac Anatomy and Physiology: A Review" by Gwen Phillips, teaches the learner to draw and label the parts of the heart and its impulse conduction system and describe the functions of these parts. The second module, "Disorders of Cardiac Conduction" by Mary E. Gotelli, examines the causes of and treatments for four types of atrioventricular conduction disorders and explains how to identify these disorders on electrocardiograms. The third module, "Basic Electrocardiography: The Electrical Anatomy of the Heart" by Sharilyn Robinson, explains how the heart is stimulated to beat and how its activities are represented on electrocardiograms. The fourth module, "Events of the Cardiac Cycle" by William G. Buskirk, describes the functions of the heart muscle and valves at each point of the cardiac cycle. The fifth module, "The EKG Connection: Patient, Lead Wires, and Electrodes" by Judy Coleman, describes electrocardiographic lead wires and their connection to electrodes on the four limbs and chest. The modules provide reinforcement exercises and post-tests. (JP)