7[7]Lombardi F. Heart rate variability- macrorhythm andmicrorhythm[ M]//Deegan T And Slann PL eds. Time Structure and Heart. New York: Oxford University Press, 1998:651 - 691
8[8]Malik M, Farrell T, Camm J. Circadian rhythm of heart rate variability after acute myocardial infarction and its in fluence on the prognostic value of heart rate varability[J ]. Am J Cardiol, 1990,66:1049