Third generation antitachycardia pacing implantable cardioverter-defibrillators.

With advanced third-generation implantable cardioverter-defibrillator (ICD) technology, patients receiving electrical therapy may only be aware of symptoms such as palpitations, or may be completely unaware of the event. Third-generation ICDs provide bradycardia back-up pacing, antitachycardia pacing (ATP), cardioversion, and defibrillation therapy. Additional benefits are noninvasive electrophysiologic testing capabilities and enhanced diagnostic features. An alternative surgical approach with a nonthoracotomy lead system is now also available.