说明：  Measurements during a tonic–clonic and a complex partial seizure are presented in Figs. 2 and 3. Especially during the tonic–clonic seizure, limits of agreement are high, possibly because the ECG signal is distorted. 3.3. Differences in measurements over all patients Both in wakefulness (U= 29, p = 0.69) and during sleep (U = 32, p=1.00), no significant difference in HRECG and OHR over all patients was found. 4. Discussion In ambulatory monitoring of patients