说明：  heart rate produced by algorithms embedded in the commercially available optical heart rate sensor. An analysis of the raw PPG signal is necessary to fully assess the usability of PPG for heart rate detection in epilepsy, for instance, by also including measures for heart rate variability. Mean heart rate is a suitable measure to detect tachycardia, bradycardia, and asystole, which are importantmarkers of clinical relevance of seizures. However, in other medical settings, such as the uation of arrhythmias [10], more features of heart rate and ECG characteristics such as QT interval,which PPG currently cannot provide, are necessary for proper monitoring. Measurements in other patient groups are necessary