Question 1

In which conditions is Heart rate variability (HRV) altered?

Accepted Answer

In the OSMF atlas Heart rate variability (HRV) is reported in Gulf War Illness, Lyme Disease, ME/CFS, PACVS. It is reduced in 5 across 5 entries.

Question 2

Does Heart rate variability (HRV) point to one specific diagnosis?

Accepted Answer

No. Because Heart rate variability (HRV) changes in several conditions (Gulf War Illness, Lyme Disease, ME/CFS, PACVS), an abnormal result cannot identify which condition, if any, is present. It must be interpreted with symptoms, history and other tests.

Question 3

Is there a standard clinical test for Heart rate variability (HRV)?

Accepted Answer

The atlas entries for Heart rate variability (HRV) do not carry a LOINC code, which usually means the marker was measured with research assays or study-specific methods rather than a routine clinical panel.

Question 4

Is one abnormal Heart rate variability (HRV) result diagnostic?

Accepted Answer

No single biomarker result is diagnostic of any of these conditions. Findings reflect group averages from published cohorts with substantial overlap between patients and controls.

Condition	Direction	Compared against	Associated symptoms	Source
Gulf War Illness	↓ reduced	healthy Gulf War veteran controls	Dysautonomia, orthostatic intolerance	Gean et al. 2021
Lyme Disease	↓ reduced	healthy controls	Fatigue, dysautonomia	Aucott et al. 2014
ME/CFS	↓ reduced	healthy controls	Dysautonomia, orthostatic intolerance	Nelson et al. 2019
ME/CFS	↓ reduced	healthy controls	Reduced autonomic flexibility	Nelson et al. 2019
PACVS	↓ reduced	healthy controls	Dysautonomia, POTS	Mundorf et al. 2024

Heart rate variability (HRV) across conditions

Where Heart rate variability (HRV) is reported

Frequently asked questions

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