{HEAD ~ The control system} 34 is coupled to a pacing, or stimulation, channel 24 and {TAIL ~ a sensing channel} 26 
is coupled to
{ HEAD ~ The control system } 34 is coupled to a pacing , or stimulation , channel 24 and { TAIL ~ a sensing channel } 26
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH