Research Article

Effects of Tibetan Music on Neuroendocrine and Autonomic Functions in Patients Waiting for Surgery: A Randomized, Controlled Study

Figure 6

Heart rate variability. (a) Normalized low frequency (LFnu), (b) normalized high frequency (HFnu), and (c) LF/HF ratio in the music group (M group) and control group (C group) at each time point. Data are presented as mean ± SD. ^, +, and .
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