4Task force of the European Society of Cardiology and the North American Society of Pacing and Eloctrophysiology. Heart rate variability, standards of measurement, physiological intepretatioa, and clinical use[ J ]. Circulation, 1996,93:1403.
5Makikallio TH, Seppanen T,AiraksinenJ,et al. Dynamic analysis of heart rate may predict subsequent ventricular tachycardia after myocardial in farction[ J]. AmJ Cardiol,1997,80(6) :779 -783.
6Kleiger RE, Miller JP, Bigger JT, et al. Decreased heart rate variability and association with increased mortality after acute myocardial infarction[J]. AmJ Eardiol,1987,59(2) :256 -263.
7Bum CS, Naas A, Freeman M, etal. QT dispersion and sudden unexpeeted death in chronic heart failure[J]. Lancet,1994,343 : 327 - 329.
8Algred A,Tijseen JG, Roelandt JR,et al. QTe prolongation measured by standard 12 - lead ECG in an independed risk factor for sudden death to cardiac arrest[ J]. Circulation,1991,83 : 1888 - 1894.
