{HEAD ~ The last recorded current cardiac events} and {TAIL ~ event markers} preceding a detection of the ventricular pause are preserved 
{ HEAD ~ The last recorded current cardiac events } and { TAIL ~ event markers } preceding a detection of the ventricular pause are preserved
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH