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