Tag: hrv
TAVNS and HRV: Statistical Analysis of Studies
Keywords: Bayesian statistics; heart rate variability; meta-analysis; tVNS; transcutaneous auricular vagus nerve stimulation. In this study, there was no evidence of TAVNS affecting the vagally mediated component of HRV. Researchers believe, however, that TAVNS does more to inhibit sympathetic activity than increase vagal activity, so TAVNS still might have benefit in improving autonomic balance.This study…
Read MoreEffects of Hyperthermia on depression, sleep and heart rate variability in patients with depressive disorder
This study looks at hot baths given twice a week in depressed patients to see if they had improvement in their symtoms and HRV. In this pilot controlled study, patients with moderate depression improved by 3 points on the HAMD scale, or about the same amount as taking an anti-depressant. There was no perceptible difference…
Read MoreHeart rate variability: Can it serve as a marker of mental health resilience?
This article looks at HRV and how it relates to subjects’ reactions to “stressful laboratory tasks” (sounds dicey!). Subjects with higher vagal activity ( ie higher HRV) before and during the challenges,had improved resilience to tasks and lower markers of stress. This could be a companion piece to this other study which advocates for HRV…
Read MoreHeart Rate Variability as Stress Biomarker: Can Machine learning improve Signal to Noise?
I’m posting slides from my upcoming presentation for UC Davis Machine Learning meeting as a way to get myself organized. The hope with this presentation is that with more sophisticated data analysis, the HRV results will be more reliable and robust.
Read MoreVagus Nerve Stimulation Modulates Complexity of Heart Rate Variability Differently during Sleep and Wakefulness
This study is looking at direct vagal nerve stimulation in epilepsy patients. Complexity is increased by vagal nerve stimulation during sleep, but not during wakefulness. This is a confounding finding! HRV with vagal nerve stimulation, both direct and through transcutaneous vagal nerve stim, is really befuddling. Ann Indian Acad Neurol. 2017 Oct-Dec; 20(4): 403–407. doi: 10.4103/aian.AIAN_148_17…
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