measured with the OHR sensor seems to be equivalent to the heart

rate derived fromautomatic ECG analysis,withmean differencesmostly

below two beats per minute. The variation in differences between both

methods, however, is high during wakefulness and during the occurrence

of two seizures included in the data.

A possible explanation for this higher variation is that movement

occurring during wakefulness and during seizures leads to artifacts in

the ECG and, therefore, less reliable derivation of HRECG. This would

be in line with previous studies proposing that