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Fig. 1 | BMC Neurology

Fig. 1

From: Power spectral analysis of heart rate variability is useful as a screening tool for detecting sympathetic and parasympathetic nervous dysfunctions in Parkinson’s disease

Fig. 1

The distribution of resting LF power (A) and resting HF power (B) in control subjects and Parkinson's disease (PD). A The values of LF powers of all participants varied from 12 ms2 to 1,008 ms2. The median values of resting LF power were 169 ms2 in control subjects and 70 ms2 in patients with PD. The difference was insignificant in the Wilcoxon rank-sum test (p = 0.09). B The values of HF powers of all participants varied from 7 ms2 to 1,957 ms2. The median values of resting HF power were 279 ms2 in control subjects and 65 ms2 in the patients with PD. The difference was insignificant in the Wilcoxon rank-sum test (p = 0.07). Focusing on the very low values of resting LF and HF powers, approximately 41% of PD patients had values below the first quartile of resting LF powers (< 58 ms2) or HF powers (< 50 ms2); however, no control subject had such low values. Abbreviations: LF, low frequency; HF, high frequency

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BMC Neurology

ISSN: 1471-2377

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