This video reviews the heart's electrical conduction system, looks at the correlation between cardiac conduction and EKG waveform, and shows which electrical events are occurring. It also demonstrates how to analyze an EKG waveform and assess atrial and ventricular dysrhythmias. Patient examples are shown to help nurses learn what causes a dysrhythmia, which dysrhythmias are potentially life-threatening, and what interventions are needed. Video, 30 minutes