8Ben-Dov IZ, Kark JD, Ben-Ishay D, et al. Blunted heart rate dip during sleep and all-cause mortality[J]. Arch Intern Med, 2007, 167(19) :2116-2121.
9Verdecchia P, Schillaci G, Borgioni C, et al. Adverse prognostic value olr a blunted circadian rhythm of heart rate in essential hy- pertension[J]. J Hypertens, 1998,16(9) : 1335-1343.
10Hozawa A, Inoue R, Ohkubo T, et al. Predictive value of ambu- latory heart rate in the Japanese general population: the Ohasama study[J]. J Hypertens,2008,26(8) : 1571-1576.