What it included
Twenty-one controlled studies in healthy participants were included.
AUTONOMIC FUNCTION & HRVSYSTEMATIC REVIEW2023
taVNS and heart rate variability
A Systematic Review of the Effects of Transcutaneous Auricular Vagus Nerve Stimulation on Baroreflex Sensitivity and Heart Rate Variability in Healthy Subjects
This systematic review examined controlled studies investigating the effects of taVNS on heart rate variability and baroreflex sensitivity in healthy participants.
Study in plain English
How taVNS is being studied in autonomic research
The review shows that HRV and baroreflex measures are active areas of taVNS research. Findings varied substantially across measures, protocols, and study designs.
What researchers measured
The review examined HRV measures and baroreflex sensitivity.
Why interpretation is careful
Results were mixed, and protocol and design differences likely contributed to variability.
Study design
How the research was structured
Study type
Systematic review
Included studies
21 controlled studies
Population
Healthy participants
Outcomes
Heart rate variability and baroreflex sensitivity
Key findings
What the study reported
Several HRV measures showed responsiveness
Significant changes were reported in several HRV measures across a substantial proportion of included studies, including SDNN, RMSSD, and pNN50.
Findings varied
Results differed across HRV measures and studies rather than showing one uniform response.
Protocol differences matter
The authors concluded that differences in study design and stimulation parameters likely contributed to mixed findings.
Important context
Limitations remain part of the finding.
The review included healthy participants, which limits generalization to clinical populations.
HRV metrics are influenced by measurement methods, recording conditions, analysis choices, and study design.
The evidence should not be simplified to the statement that taVNS increases HRV.
What this study does not show
The review does not establish a uniform increase in HRV across protocols or measures.
It does not identify one universally optimal stimulation protocol.
It is not clinical evidence for the Neuvago device itself.
Continue exploring
Related research paths
Heart Rate Variability
Explore HRV measurement, interpretation, autonomic context, and the limits of using one marker in isolation.
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Place HRV findings within broader sympathetic and parasympathetic research.
Explore autonomic topictaVNS research
Review the wider auricular stimulation field and the protocol variables that affect interpretation.
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Browse the complete collection of study summaries and foundational research.
Browse all studiesResearch boundary
This page summarizes peer-reviewed research for educational purposes. The study provides scientific context for the taVNS field and should not be interpreted as clinical evidence for the Neuvago device, medical advice, diagnosis, or treatment guidance.