| Literature DB >> 3970172 |
B Pomeranz, R J Macaulay, M A Caudill, I Kutz, D Adam, D Gordon, K M Kilborn, A C Barger, D C Shannon, R J Cohen.
Abstract
Spectral analysis of spontaneous heart rate fluctuations were assessed by use of autonomic blocking agents and changes in posture. Low-frequency fluctuations (below 0.12 Hz) in the supine position are mediated entirely by the parasympathetic nervous system. On standing, the low-frequency fluctuations increase and are jointly mediated by the sympathetic and parasympathetic nervous systems. High-frequency fluctuations, at the respiratory frequency, are decreased by standing and are mediated solely by the parasympathetic system. Heart rate spectral analysis is a powerful noninvasive tool for quantifying autonomic nervous system activity.Entities:
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Year: 1985 PMID： 3970172 DOI： 10.1152/ajpheart.1985.248.1.H151
Source DB: PubMed Journal: Am J Physiol ISSN： 0002-9513