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