{TAIL ~ The lower threshold limit} is automatically adjusted as {HEAD ~ a function} of an independently sensed physiological parameter that predicts a normal or natural change in the heart rate 
{ TAIL ~ The lower threshold limit } is automatically adjusted as { HEAD ~ a function } of an independently sensed physiological parameter that predicts a normal or natural change in the heart rate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH