- an electric power to deliver an electric current calibrated length, shape and intensity,
- a means of transmitting electrical impulses to the patient, two pallets conductive block connected to the electrical cable, two large, flat electrodes, coated with a conductive gel that are stuck onto the patient. The position of the electrodes is either anterior-posterior (electrode before, at the sternum, the other being stuck in the back) or anterolateral (the first electrode being in front, slightly to the portable defibrillator right of the sternum, the second on the left side of chest). It seems that the first position is slightly more effective for defibrillation.
The device delivers the portable defibrillator electrical shock called a defibrillator. It usually works on batteries to be mobile. It comprises at least: