Electrode system for a physiological stimulator

Apparatus, comprising:

• a physiological power source having conductive lines for applying therapy to a patient, the physiological power source configured to generate and send signals through the conductive lines and configured to monitor and receive signals through the conductive lines, the signals being defined as a defibrillation signal, a pacing signal, and a monitoring signal;
• first, second, and third electrode pads in communication with the conductive lines and adapted to be attached externally to the patient, each of the electrode pads configured to receive through the conductive lines defibrillation and pacing signal to the patient, and each of the electrode pads configured to send through the conductive lines to the physiological power source monitoring signals, such that each of the first, second, and third electrode pads are capable in different combinations thereof of alternating between delivering said defibrillation and pacing signals to the patient and between delivering monitoring signals to the physiological power source particularly when the first electrode is positioned on the patient in an anterior apex position, the second electrode is positioned on the patient in an anterior sternum position, and the third electrode is positioned on the patient in a posterior position;
• and
• the physiological power source further including modes of operation defined by at least a first mode and a second mode of operation and the physiological power source configured to switch between modes of operation while applying therapy to the patient,
• wherein the first mode of operation is defined by the physiological power source being configured to receive monitoring signals from the first electrode pad, being configured to send pacing signals to the third electrode pad, and further configured to alternate between receiving monitoring signals and sending pacing signals to the second electrode pad;
• and wherein the second mode of operation is defined by the physiological power source being configured to send defibrillation signals to the first, second and third electrode pads.