4Benditt DG, Sutton R. Tilt-table testing in the evaluation of syncope[J]. J Cardiovase Eleetrophysiol,2005,16(3) :356-358.
5Schuchert A, Aaas R, Kretzschmar C, et al. Diagnostic yield of external electrocardiographic loop recorders in patients with recurrent syncope and negative tilt table test [J]. Pacing Clin Electtrophysiol, 2003,26 ( 9 ) : 1837-1840.
6Longin E, Gerstner T, Schaible T, et al. Maturation of the autonomic nervous syslem: differences in heart rate variability in premature vs term infants [J]. J Perinat Med, 2006, 34 (4) :303-308.
7Agnieszka Z. Heart rate variability in children with neurocardiogenic syncope[J]. Clin Auton Res,2004, 14(2) :99-106.
