6Routledge FS,Campbell TS,McFetridge-Durdle JA.Improve- ments in heart rate variability with exercise therapy[J].Can J Cardio1,2010,26 (6) :303-312.
7Huikuri R.Heart rate variability in coronary artery disease[J]. J Int Med,2005,237 : 349.
8Paola Contreras.Correlations between frequency-domain HRV indices and lagged poincar'e plot width in healthy and dia- betic subjects[J]Physiol Meas,2007,28:85-94.