Lead 168 corresponds to {HEAD ~ lead} 68, illustrated in FIG 1, with sensor 164 corresponding to {TAIL ~ sensor} 64 
Lead 168 corresponds to { HEAD ~ lead } 68 , illustrated in FIG 1 , with sensor 164 corresponding to { TAIL ~ sensor } 64
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH