{HEAD ~ The pacing channel} 24 includes {TAIL ~ a pulse generator circuitry} for generating stimulation pulses of a prescribed pulse width amplitude and rate, as is commonly done in a pacemaker 
includes
{ HEAD ~ The pacing channel } 24 includes { TAIL ~ a pulse generator circuitry } for generating stimulation pulses of a prescribed pulse width amplitude and rate , as is commonly done in a pacemaker
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH