Since the publication of the first edition of Cardiac Pacing for the Clinician, the use of implantable cardiac devices has expanded rapidly. Certain classes of devices such as implantable loop recorders and cardiac resynchronization pacing systems were not commonly used when the first edition was published, and recent studies have shown that implantable cardioverter defibrillators are beneficial in large, previously unrecognized patient populations at risk for sudden death. In order to meet this demand, cardiologists without special training in electrophysiology or pacing are implanting an...