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Heart Rate Calculation Method
Introduction
This section describes the heart rate (HR) calculation within the LifeWatch V. HR is defined as the number of
heart beats during a GIVEN TIME INTERVAL (usually one minute). It is reported by the algorithm each time
a QRS complex is detected.
Method of Calculation
The momentary HR is the inverse of the time lasting between two consecutive heart beats. As the
momentary HR fluctuates due to inaccuracies in detecting the exact R wave timing eight momentary HR
values are averaged to generate the displayed HR. Therefore the reported HR is the mean of the last
momentary HR values WHICH CORRESPOND TO THE DETECTED R COMPLEXES FOR THE LAST 8
SECONDS.
OCCASIONS IN WHICH THE HR IS NOT REPORTED: If during a specific QRS complex the signal is
considered as too low to be considered accurate or is considered as noise, the displayed HR will be 0.
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