说明：  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