Defibrillation systems pulse generators

Implantation of transvenous ICD systems employs techniques similar to those used for permanent pacemaker implantations, and is discussed in detail in a separate chapter in this book. Connecting ICD leads to the device is slightly different than connecting pacemaker leads to pacemaker generators. All ICD pulse generators have at least three ports for single chamber devices (four ports for dual chamber devices, and five ports for CRT-D). One LV port is for the pace/sense IS-1 terminal pin, and two are for the defibrillation coil (usually DF+ and DF-). The second DF port may be capped if a single coil... 

An implantable cardioverter-defibrillator (ICD) has a programmable pulse generator and lead system that monitors the heart s activity, detects ventricular arrhythmias and other tachyarrhythmias, and responds with appropriate therapies. The range of therapies includes antitachycardia and antibradycardia pacing, cardioversion, and defibrillation. Newer defibrillators can also pace both atrium and ventricle. 

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