Abstract
Technical and instrumental advance of various AICDs is discussed. The second generation device (CPI, Ventak P1600) can work as a cardioverter device, but has not the ability for back-up pacing or antitachypacing. The third generation devices (Medtronic, PCD and CPI, Ventak PRXII) has both abilities for pacing and cardioversion. But these devices have large bodies (weight 197-235g) and their defi-brillating efficiencies are not sufficient. These devices should be implanted into abdominal subcutaneous space, in addition to supplemental implantation of subcutaneous patch leadinto the chest wall. The fourth generation device (Medtronic, Jewel Plus PCD and CPI, Ventak mini) can be implanted into the chest subcutaneous space and the subcutaneous patch lead is not required because defibrillating efficiency is improved by using biphasic shock pulse.
