The autonomic nervous system plays a central role in regulation of host defense and in physiological responses to sepsis, including changes in heart rate and heart rate variability. The cholinergic anti-inflammatory response, whereby infection triggers vagal efferent signals that dampen production of proinflammatory cytokines, would be predicted to result in increased vagal signaling to the hea...

There is a limited number of studies on heart rate variability (HRV) dynamics immediately after exercise. It is well-known that the electrocardiogram is a non-invasive method that can be used to measure heart rate variability (HRV) at rest and after exercise. Photoplethysmogram (PPG) signals also reflect the cardiac rhythm since the mechanical activity of the heart is coupled to its electrical ...

Correspondence to: Dr. Victor Dan Moga, e-mail: [email protected]. SUMMARY: Despite the development of pharmacological therapy and/or device therapy, atrial fibrillation remains a leading cause for morbidity and mortality. Heart rate variability (HRV) is studied only in the presence of sinus rhythm. Currently, three different categories of methods in HRV analysis are being used; the time do...

The number of publications investigating heart rate variability (HRV) in psychiatry and the behavioral sciences has increased markedly in the last decade. In addition to the significant debates surrounding ideal methods to collect and interpret measures of HRV, standardized reporting of methodology in this field is lacking. Commonly cited recommendations were designed well before recent calls t...

Background: Since panic is characterized by stress-induced autonomic cardiac sensations, such as increased heart rate and palpitations, effects of experimental psycho-social stress on heart rate variability are of interest. Methods: 25 patients with a current panic disorder and 25 healthy controls matched by age and sex underwent the Trier Social Stress Test on two consecutive days. Heart rate ...

Heart rate variability (HRV) is a well established mortality risk factor in both healthy dogs and those with heart failure. While the standards for short-term HRV analysis have been developed in humans, only reference values for HRV parameters determined from 24-hour ECG have been proposed in dogs. The aim of this study was to develop the reference values for short-term HRV parameters in a grou...

The goal of the study was assessment of the hour-long training involving handling virtual environment (sVR) and watching a stereoscopic 3D movie on the mechanisms of autonomic heart rate (HR) regulation among the subjects who were not predisposed to motion sickness. In order to exclude predispositions to motion sickness, all the participants (n=19) underwent a Coriolis test. During an exposure ...

Remote measurement of the blood volume pulse via imaging photoplethysmography (iPPG) using digital cameras and ambient light has great potential for healthcare and affective computing. This study introduces this iPPG method for detecting infant’s emotions pattern (discomfort and neutral) using video frames obtained from a low-cost webcam. Ten infants were obtained for heart rate(HR) and heart r...

The authors investigated whether heart-rate variability can serve as a device for real-time quantitative measurement of hypnotic depth. This study compared the continuous self-rated hypnotic depth (SRHD) of 10 volunteers with heart rate, amplitude, and frequency changes from a time-frequency analysis of heart-rate variability (HRV). The authors found significant linear relationships between SRH...