Hartmann Veroval BP750X Instructions For Use Manual page 60

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If the displayed heart rate flashes, this means that the ECG signals are unsta-
ble or weak. In this case, repeat the recording.
The contraction of the heart muscle is stimulated by electrical signals. A
disorder of these electrical signals is called an arrhythmia. This may be
due to a genetic predisposition, stress, age, lack of sleep, exhaustion or
similar factors. A doctor can establish whether an irregular heartbeat is
the result of an arrhythmia.
Possible reasons for an invalid ECG recording
The ECG recording can be invalid for the following reasons:
The contact between the electrodes
and the finger is not sufficiently firm.
The device is held in the wrong direc-
tion and the wrong side is pressed
against the chest.
Recordings that are made over or
through clothing.
The device is held in the left hand for
method 1.
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