2[1]Frey B,Binder T,Teufelsbauer H,et al.Heart rate variability and patient outcome in advanced heart failure.J Am Coll Cardiol,1993,21:286A.
3[2]Beattie WS,Buckley DN.Frequency domain measures of heart period and postoperative ischemia.Anesthesiology,1993,79:1249.
4[3]Smiley RM,Pantuck CB,Morelli JJ, et al.Alterations of the β-adrenergic receptor system after thoracic and abdominal surgery.Anesth Analg,1994,79:821.
5[4]David A,Martin F,Carol B, et al.Persistent alterations of the autonomic nervous system after noncardiac surgery.Anesthesiology,1998,89:30.
