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Min HR calculation:
Due to the fact that Min HR is sensitive to extreme values (that are
also caused by noise, disconnections and other artifacts), for every
minute, the Min HR is calculated as follows:
Where:
LowerX is defined as the minimal HR of (100-x)% of the HR values,
while x=6.
And:
RawMinHR is the direct minimal value of HR.
When a Brady event is detected, there will not be any filtering of
extreme values for min HR (i.e., the raw min HR is being used).
Note:
The Max and Min HR calculation may be affected by nearby
electromagnetic radiation, a sudden movement of the patient,
disconnection of the electrodes from the body, etc.
Pause Calculation
Pause is considered a lack of Ventricular activity for more than 3
seconds. In order to detect a pause one of two conditions needs to be
detected:
1. Lack of QRS detection for more than 3 seconds
2. A flat signal (P complexes can occur) for slightly less than 3
seconds.
Once one of the above conditions is detected a pause event is called.
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RawMinHR
avgHR
Max
LowerX
Min
MinHR