Implantable cardioverter-defibrillators (ICDs) represent an important therapy for people susceptible to sudden cardiac death. These devices monitor the heart for abnormal rhythms, and can deliver either pacing or shock therapy to terminate the episode. ICDs sense the electrical activity of the heart through leads attached to the internal surface. Present devices use a single ventricular lead inserted in the right ventricular apex (RVA). Future devices will use an additional atrial lead placed in the high right atrium (HRA). These leads measure electrical potential and recordings made from such leads are called intracardiac electrograms (ICEGs).
KeywordsVentricular Tachycardia Ventricular Fibrillation Sinus Tachycardia Normal Sinus Rhythm Probability Density Function
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