Unfortunately, because of the length of time required for publishing a comprehensive review of a rapidly changing field, recent data from important trials could not be included. For example, the second Multicenter Automated Defibrillator Implantation Trial, which further established the role of implantable cardioverter-defibrillators (ICDs) in the primary prevention of ventricular arrhythmias, is not included. While there is an ongoing debate concerning the cost implications in the use of ICDs, it would have been very germane to the discussion in Chapter 14 of the role of ICD therapy in this context. However, some topics, such as upcoming catheter ablation technologies, research efforts in dual-lead atrial pacing for atrial fibrillation, and mapping of ventricular tachycardia in the context of radiofrequency ablation, exceed the requirements of the nonelectrophysiologist. In addition, those readers hoping to learn of the molecular breakthroughs in EP will have to look elsewhere. Paradoxically, another deficiency in a text that seemingly is aimed at the generalist is the lack of detailed chapters regarding pacemaker care or lifestyle restrictions.