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首頁> 美國(guó)衛(wèi)生研究院文獻(xiàn)>other >LF 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
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LF 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

機(jī)譯：心臟心率變異的LF功率不心臟交感神經(jīng)張力的措施但可能是由baroreflexes心臟自主外流的調(diào)制的措施

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Power spectral analysis of heart rate variability (HRV) has been used frequently to assess cardiac autonomic function; however, the relationship of low frequency (LF) power of HRV 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.

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