Swyer syndrome is one of the disorders sexual differentiation. Previous studies have demonstrated increased sympathetic activity with heart rate variability (HRV) analysis decreasing estradiol levels. One patient presented a pure 46, XY gonadal dysgenesis female phenotype. Cardiac autonomic modulation was assessed through HRV while at rest. This research analyzed linear and nonlinear indexes. s...

Introduction: Short stature and/or low birth weight are associated with an enhanced cardiovascular mortality. Autonomic imbalance measured by reduced heart rate variability (HRV) is an important surrogate parameter for cardiovascular risk stratification. We recently showed reduced 24 hour HRV in some children with a height below the third percentile. We sought to determine if supplementation of...

The last two decades have witnessed the recognition of a significant relationship between the autonomic nervous system and cardiovascular mortality, including sudden cardiac death. Experimental evidence for an association between a propensity for lethal arrhythmias and signs of either increased sympathetic or reduced vagal activity has encouraged the development of quantitative markers of auton...

The last two decades have witnessed the recognition of a significant relationship between the autonomic nervous system and cardiovascular mortality, including sudden cardiac death. Experimental evidence for an association between a propensity for lethal arrhythmias and signs of either increased sympathetic or reduced vagal activity has encouraged the development of quantitative markers of auton...

Resting heart rate variability (HRV) can serve as an index of self-regulatory strength. In the present study we tested the hypotheses that HRV, indexing adaptive self-regulation, is associated with subjective wellbeing, and that this association is mediated by the habitual use of strategies of emotion regulation that involve executive functions. In addition to measuring heart rate at rest, subj...

This paper shows that variations in breathing patterns broaden heart rate variability (HRV) spectral bands and increase the power amplitude of low-frequency bands. Because of these influences, spectral markers for HRV signals, such as the quotient between spectral power at different frequency bands, should be compared only under controlled breathing conditions or after considering the effect of...

Analysis of heart rate variability (HRV) is a promising diagnostic technique due to the noninvasive nature of the measurements involved and established correlations with disease severity, particularly in inflammation-linked disorders. However, the complexities underlying the interpretation of HRV complicate understanding the mechanisms that cause variability. Despite this, such interpretations ...

BACKGROUND We sought to determine whether heart rate variability (HRV), blood pressure (BP) variability, and baroreceptor-heart rate reflex sensitivity can be reliably assessed using finger volume pulse waveforms obtained from the commercially available EndoPAT device. METHODS Non-invasive BP (Finometer Pro as a non-invasive standard) and finger volume (EndoPAT) waveforms were recorded in 65 ...

Introduction Familial Mediterranean Fever (FMF) is an autoinflammatory disorder characterized by recurrent fever associated with inflammation of serous membranes. There is no study reporting the assessment of autonomic functions by using heart rate variability (HRV) in children with FMF. HRV is a practical and reliable method for evaluation of autonomic functions. HRV studies have pointed to th...

Vagus nerve stimulation (VNS) is a new therapeutic option for refractory epilepsy. We report a patient with Lennox-Gastaut-Syndrome (LGS) and a severe impairment of heart rate variability (HRV), we could demonstrate in our patient that HRV was improved by VNS.