心率变异性的低频功率不是心脏交感神经张力的测量指标，但可能是通过压力反射调节心脏自主神经输出的测量指标。

Low-frequency power of heart rate variability is not a measure of cardiac sympathetic tone but may be a measure of modulation of cardiac autonomic outflows by baroreflexes.

机构信息

Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1620, USA.

出版信息

Exp Physiol. 2011 Dec;96(12):1255-61. doi: 10.1113/expphysiol.2010.056259. Epub 2011 Sep 2.

DOI:10.1113/expphysiol.2010.056259

PMID:21890520

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3224799/

Abstract

Power spectral analysis of heart rate variability has often been used to assess cardiac autonomic function; however, the relationship of low-frequency (LF) power of heart rate variability to cardiac sympathetic tone has been unclear. With or without adjustment for high-frequency (HF) power, total power or respiration, LF power seems to provide an index not of cardiac sympathetic tone but of baroreflex function. Manipulations and drugs that change LF power or LF:HF may do so not by affecting cardiac autonomic outflows directly but by affecting modulation of those outflows by baroreflexes.

摘要

心率变异性的功率谱分析常用于评估心脏自主功能；然而，心率变异性的低频（LF）功率与心脏交感神经张力的关系尚不清楚。无论是否调整高频（HF）功率、总功率或呼吸，LF 功率似乎都不能提供心脏交感神经张力的指标，而是提供了压力反射功能的指标。改变 LF 功率或 LF:HF 的操作和药物可能不是通过直接影响心脏自主流出，而是通过影响压力反射对这些流出的调制来实现的。