{HEAD ~ Battery supply ground} is in common with one of the defibrillator leads, and conventional pacers provide {TAIL ~ pacer pulses} with respect to battery ground 
{ HEAD ~ Battery supply ground } is in common with one of the defibrillator leads , and conventional pacers provide { TAIL ~ pacer pulses } with respect to battery ground
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH