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