The folded lead is advanced until {HEAD ~ the distal end} of {TAIL ~ the lead} passes the entrance to the interior jugular vein 
of
The folded lead is advanced until { HEAD ~ the distal end } of { TAIL ~ the lead } passes the entrance to the interior jugular vein
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH