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. 2013 Feb 20:4:26.
doi: 10.3389/fphys.2013.00026. eCollection 2013.

The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance

George E Billman  1
Affiliations

The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance

George E Billman. Front Physiol. .
No abstract available

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Figures

Figure 1
Figure 1
An illustration of the possible non-linear effects of varying cardiac sympathetic and cardiac parasympathetic nerve activity on LF/HF. This graph was constructed using the following formula (derived from a synthesis of the literature, particularly Randall et al., ; Taylor et al., ; Cohen and Taylor, 2002): LF/HF = (0.5 parasympathetic + 0.25 sympathetic nerve activity)/(0.9 parasympathetic + 0.1 sympathetic nerve activity). The nerve activity was varied from baseline (1 arbitrary unit each) increasing or decreasing by up to a factor of 10 (i.e., from 0.1 to 10 units).
See this image and copyright information in PMC

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