1Furian R, Guzzetti S, Crivellaiow, et al. 24-hour assessment of the neural regulaton of systemic arterial pressure and RR variabilities in ambulant sudjects. Ciuculation,1990,81 : 537-547.
2Kummell HC, Leeuwen PV, Heckmann C, et al. Quality of life and Circadian variation of heart rate and heart rate variability in short-term survivors and nonsurvivors after acute myocardial infarction. Clin cardiol, 1993,16:776-783.
3Raeder EA, Hohntoser SH, Cradoys TB, et a. Spontaneous Variability and circadian distribution of ectopic activity in patients with malignant ventricular arrhythmia. JACC, 1988,12: 656-661.
4Billette J, Nadear RA, Roberge F. Relation between the minimum RR interval during artrial fibrillation and functional refractory period of the AV junction. Cardiovasc Res, 1974, 8:347-355.