1156 - Wireless Heart Rate Sensor
12 / 21 | Revision: 0 | DS033
electrocardiogram (which is used to record the hearts electrical activity). However, the periodicity of the
signal is unchanged and the Heart Rate sensor can be effectively used to detect changes in heart
rate.
The upstroke, called the anacrotic limb, is abrupt and is due to contraction of the ventricle (systole).
The downstroke is more gradual and corresponds to the elastic recoil of the arterial walls. The
downstroke regularly shows a fluctuation known as the dicrotic notch. This is due to vibrations set up
when the aortic valve snaps shut – it has no major significance as an indicator of health.
For a healthy person at rest, the heart beats on average at about 60 beats per minute or one a second
i.e. around 1 Hz. This frequency is not constant (even in a healthy individual at rest).
It takes approximately one second to record a complete wave, so it is usually best to select a short
recording time.
This Sensor is not waterproof. Clean the clip by wiping with a cloth that has been rinsed in
disinfectant.
