Tag: Heart Rate Variability
Optimal HRV Autonomic Balance State for Flow
Optimal Autonomic State for Enhanced Flow HRV This article turns the Autonomic Nervous System and HRV paradigm on its head. In general, too much sustained Sympathetic Activity leads to poor health outcomes. More depression, poor sleep, poor immunity, inflammation etc… In this study, the authors wanted to see where someone would experience the most “flow”…
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 MoreTranscutaneous Electrical Stimulation of PC5 and PC6 Acupoints Modulates Autonomic Balance in Heart Transplant Patients: A Pilot Study.
This represents another study using transcutaneous electrical stimulation instead of needle stimulation. I had a hard time interpreting their results presented, but they claim that there was an improvement in their HRV with better sympathovagal balance during the stimulation and moderately after. The thing is that transplanted hearts are without innervation, so it’s hard to…
Read MoreTranscutaneous Electrical Acustimulation Combined with Deep Breathing Relieves GERD via the Autonomic Nervous System: HRV study
This study looks at using a home TENS type system for 30 minutes twice a day for 30 days. Their GERD improves in many different parameters, and their HRV improves from the first session to the final session also. I’m not surprised! I got the article in the mail and, alas, there is not online…
Read MoreHiguchi Fractal Dimension of Heart Rate Variability During Percutaneous Auricular Vagus Nerve Stimulation in Healthy and Diabetic Subjects
Since I’m hopeless at the math part of HRV, I contacted the developers of the software I use and they thought that Correlation Dimension was the calculation most akin to the Higuchi Fractal Dimension. I’ve been looking at that in some of the patients I’ve studied but can’t see much, at least yet. The authors…
Read MoreElectroacupuncture and HRV in Fibromyalgia Patients
This article challenges many of my hypotheses and assumptions. What they found when measuring HRV in the morning on 22 fibromyalgia patients after receiving weeks of acupuncture was increased sympathetic tone. They then attribute this increase in sympathetic tone to positive clinical benefit because of a relative decrease in sympathetic tone in the morning usually. …
Read MoreHeart Rate Variability as Biomarker of Prevention and Resilience in the Acupuncture Clinic: A Year Long Study of Migraine Patients
I’m considering this post “self publishing” of a recent write up I did for Journal of Medical Acupuncture. They declined it on the basis that I needed an “IRB” which would be impossible since I have no board to apply to. I’m still okay with this paper. The Introduction especially summarizes how I see the…
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…
Read MoreCurrent Directions in the Auricular Vagus Nerve Stimulation II – An Engineering Perspective
I’ve made the first pass through of this informative paper. It discusses the current state of the art of TAVNS or aTVNS which is auricular (ear) vagal nerve stimulation. There seems to be consensus that percutaneous needles with stimulation are the way to go. Also that closed loop biofeedback will make the stim more effective. …
Read MoreHeart-rate variability indices as predictors of the response to vagus nerve stimulation in patients with drug-resistant epilepsy.
I came across this article while reading a recent review of the engineering behind auricular vagal nerve stimulation. This was at the tail end of the paper, and I have to admit, I feel validated. The first poster and publication I did was on the correlation between clinical responders and their change in HRV for…
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