[Technology and algorithms for implantable dual chamber defibrillators]

The next generation of implantable cardioverter/defibrillators (ICDs) will have the capability for sensing and defibrillating in both chambers of the heart. These devices, which are presently being developed, will thus be able to differentiate between ventricular and supraventricular tachycardias, and to respond accordingly. The burden of stress on the patient will therefore also be further reduced by avoiding unnecessary shock treatment of supraventricular tachycardias. In addition, the new generation of ICDs can also be used for the treatment of chronic atrial tachyarrhythmias. With the dual-chamber IEGM-recording capability, these ICDs will also provide the physician with an important diagnostic tool. The present article describes such an ICD.