background and objective: obstructive sleep apnea syndrome (osas) is a prevalent disease in adults. limited evidence regarding the effect of severity of sleep apnea and depression on heart rate variability (hrv) indices exists. hence, we decided to focus on the association between hrv and severity of osas based on depression score. materials and methods: a total of 193 patients with confirmed o...

SPECIAL ISSUE Heart Rate Variability Biofeedback, Self-Regulation, and Severe Brain Injury Sonya Kim, PhD, CRC, Joseph F. Rath, PhD, Rollin McCraty, PhD, Vance Zemon, PhD, Marie M. Cavallo, PhD, and Frederick W. Foley, PhD Department of Rehabilitation Medicine, New York University School of Medicine, New York, NY; Rusk Institute of Rehabilitation Medicine, New York University School of Medicine...

In recent years there has been substantial support for heart rate variability biofeedback (HRVB) as a treatment for a variety of disorders and for performance enhancement (Gevirtz, 2013). Since conditions as widely varied as asthma and depression seem to respond to this form of cardiorespiratory feedback training, the issue of possible mechanisms becomes more salient. The most supported possibl...

Introduction Heart rate variability biofeedback (HRVB) has enjoyed a good deal of popularity in recent years. A number of commercial products have been introduced ranging in price from $80 (MyCalmBeat by Brain Resourcet) to over $200 (Alivee by Somatic Vision, Inc.). The advertising for these products claims efficacy for a large number of disorders and, in fact, we are quite optimistic about th...

Emotions involve subjective feelings, action tendencies and physiological reactions. Earlier findings suggest that biofeedback might provide a way to regulate the physiological components of emotions. The present study investigates if learned heart rate regulation with biofeedback transfers to emotional situations without biofeedback. First, participants learned to decrease heart rate using bio...

in this paper the main objective is to quantify and compare the instantaneous value of heart rate for normal breathing patterns during meditation and non meditation conditions. this paper involves analysis of variance (anova) technique for the analysis of the heart rate variability patterns during the meditative and non meditative states. the analysis is divided into three stages i.e. data acqu...

We present Chill-Out, an adaptive biofeedback game that teaches relaxation skills by monitoring the breathing rate of the player. The game uses a positive feedback loop that penalizes fast breathing by means of a proportionalderivative control law: rapid (and/or increasing) breathing rates increase game difficulty and reduce the final score of the game. We evaluated Chill-Out against a conventi...

IntroductIon Poststroke depression (PSD) is one of the common complications of cerebrovascular diseases. Drug therapy and cognitive behavioral therapy are two commonly used methods in current clinical treatments of PSD. However, either method has its own drawbacks: The former has problems such as the slow onset of action and various side effects, and patients often have a poor response to the l...

Mindfulness has become increasingly popular as a method for building resilience against stress in both clinical and healthy populations. This study sought to investigate the effects of mindfulness training on perceived levels of stress and heart rate variability in students. Thirteen Westminster University undergraduates enrolled in the Clinical Applications of Mindfulness module undertook an e...