说明：  1] Lamberts RJ, Thijs RD, Laffan A, Langan Y, Sander JW. Sudden unexpected death in epilepsy: people with nocturnal seizures may be at highest risk. Epilepsia 2012 53(2):253–7. [2] Zijlmans M, Flanagan D, Gotman J. Heart rate changes and ECG abnormalities during epileptic seizures: pr ence and definition of an objective clinical sign. Epilepsia 2002 43(8):847–54. [3] van Elmpt WJ, Nijsen TM, Griep PA, Arends JB. A model of heart rate changes to detect seizures in severe epilepsy. Seizure 2006 15(6):366–75. [4] Allen J. Photoplethysmography and its application in clinical physiological measurement. Physiol Meas 2007 28(3):R1-39. [5] Afonso V, Tompkins W, Nguyen T, Luo S. ECG beat detection