Several embodiments of an automatic external defibrillation system (2) comprising external interconnected defibrillator modules (4a) and (4b) are described. The modules (4a) and (4b), upon detection of ventricular fibrillation (VF) by microcomputer (100) via sensing electrodes (26) automatically insert defibrillation electrodes (14) into patients body (6) and commence delivering defibrillating pulse from the pulse generator (102) to the patients heart.An integral defibrillation system (300) having articulating defibrillating elements (4c) and (4d) conforming to patients body (6) is also described.Defibrillation electrodes (14) of embodiment (2) are automatically inserted into patients body in a helical motion, while their counterparts (70) of embodiments (60a) and (60b) are automatically inserted in an essentially downward motion.
