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