View clinical trials related to Autonomic Nervous System.
Filter by:This randomized controlled trial will assess the effects of External Cues focused messaging (i.e., government recommendations of MyPlate) compared to Internal Cues focused messaging (i.e., intuitive eating). The investigators will collect data on within-person changes in psychological (e.g. affect) and physiological (e.g. heart rate variability) outcomes in female college students. Participants will be randomly assigned to one of two study conditions. In condition one, participants will view a five-minute video focusing on traditional nutrition education principles. In condition two, participants will view a five-minute video focusing on intuitive eating principles.
Cardiovascular disease is one of the most important causes of death and disability in the world. An autonomic imbalance is associated to cardiovascular risks and disorders. Electrical stimulation (ES) applied by surface electrodes is a non-invasive therapeutic approach with low side-effects. In the last years, some studies had investigated the effects of ES on the autonomic nervous system and cardiovascular system. However, different intensities, frequencies and electrode locations had been used, which makes difficult to clarify the optimal parameters. The aim of this study is to analyze the effects of ES on autonomic nervous modulation in healthy subjects comparing three different locations of application for ES. Participants will be aleatory assigned to one of three groups for a single-session of 20-minute transcutaneous ES: a) an auricular intermittent ES in an area that is believed to be connected to the vagal nerve (cymba conchae); b) an auricular sham intermittent ES, meaning a real ES but applied on an ear location not connected to the vagal nerve (scapha); and c) an upper back continuous ES (C7-T4), a placement that is thought to be connected to the stellate (sympathetic) ganglion. All the protocols will be stated at a non-painful intensity. After that, the hand grip exercise will be executed. The heart rate variability (HRV) and heart frequency (HR) will be measured in four main times: the baseline, in the final minutes of the ES, after the ES and after finishing the hand grip exercise. Blood pressure will be measured also at all the time points except during the ES due to the possibility of interferences. Adverse effects will be assessed after ES and 48 h later. The study will provide initial knowledge about how different electrical stimulation locations contribute to reduce sympathetic excitation and improve the sympathovagal balance.
The autonomic nervous system (ANS), regulating involuntary physiologic processes including heart rate and blood pressure, is affected by changes in the cerebral vessels like carotid artery stenosis, occlusion, carotid artery stent and endarterectomy. Until now, no data concerning autonomic nervous system in patients with acute intracranial large artery occlusion and thrombectomy is available. Due to the known effect on ANS in case of pathologies of extracranial brain supplying arteries it is highly suspected that intracranial large artery occlusion and thrombectomy can affect the ANS as well. The aim of this project is to determine autonomic parameters during and after thrombectomy in patients with large cerebral artery occlusion. The project is a prospective descriptive pilot study at the University Hospital Tulln. 20 patients will be assessed during and after thrombectomy up to three months post intervention. A combination of autonomic parameters, hemodynamic parameters and clinical outcome will be evaluated.
The purpose of this study is to evaluate the effects of several manual therapy techniques on autonomic nervous system and to compare it with other groups in the study such as deep-slow breathing group and the control group. The measurements will take place right before and after the intervention to evaluate the effects of one single intervention.
The investigators sought to evaluate the incidence and influence of vagal response observed during cryoballoon-based pulmonary vein isolation on the cardiac autonomic nervous system (CANS) and ablation outcomes in paroxysmal atrial fibrillation cohort. 296 patients were treated with a 28-mm second-generation cryoballoon (Arctic Front Advance, Medtronic). Preprocedural pulmonary veins anatomy and their ostial dimensions were acquired with a computed tomography. 74 patients without structural heart disease and with no concomitant diseases were chosen for a detailed CANS assessment with heart rate variability analysis. All patients were screened over a 2-year post-ablation period.
A study to explore whether different temperatures of warm water footbaths have different effects on the cardiovascular system, the autonomic nervous system and the general well-being of healthy women.
Heart rate variability(HRV) and electroencephalography(EEG) has been used widely in anesthetic practice nowadays. One of the most dominant applications is the nociception-analgesia balance. Some evidence support that heart rate variability correlates with perioperative stimulation and postoperative pain score. There are some new evidence support EEG correlated with anesthesia depth and analgesic balance. However, the heterogeneity between the studies and interference factors has limited their usage in clinical practice. On the other hand, peripheral nerve block is broadly used as a routine technique with general anesthesia, but few studies discuss the effect on heart rate variability. Our study focuses on the different HRV and EEG patterns of incision and insufflation during laparoscopic surgery with general anesthesia. Furthermore, we measure the effect of transversus abdominis plane nerve block to heart rate variability during surgery. By this comparison, we can discuss the influences of somatic stimulation, visceral stimulation, and pneumoperitoneum to heart rate variability, and then improve the accuracy of HRV-based nociception-analgesia monitors.
The autonomous response of fighter and attack pilots who attend sessions in a flight simulator will be evaluated by measuring and analyzing heart rate variability (HRV).
Yoga has received considerable attention for its potential therapeutic benefits over the past decades and it gradually became object of scientific scrutiny. There is currently extensive literature supporting its use as a non-pharmacological tool for managing a variety of medical problems. A few studies have also explored potential beneficial effects of practising yoga during pregnancy on maternal and neonatal outcomes. An association between prenatal yoga and decreased incidence of fetal growth restriction, preterm delivery, and labor abnormalities resulting in operative delivery have been reported. Exact mechanisms by which yoga could improve perinatal outcomes have not been elucidated yet. One of such mechanisms could be the positive effect of yoga on autonomic nervous system (ANS). Maternal cardiovascular system undergoes profound changes during pregnancy and ANS plays a central role in adaptation to pregnancy-related hemodynamic changes. Increase in peripheral vascular resistance that characterises hypertensive disorders in pregnancy with fetal growth restriction is mediated by substantial increase in sympathetic vasoconstrictor activity. Effects of yoga on ANS outside of pregnancy have already been investigated in several studies. Heart rate variability (HRV) indices, used as a one of proxy measures for ANS activity, showed significant shifts towards parasympathetic dominance following yoga sessions. Another objective means of assessing ANS activity is measurement of phase synchronisation between cardiovascular and respiratory systems following acute challenge. The higher the cardiorespiratory synchronisation after acute challenge is, the higher is the ability of ANS to flexibly adapt to challenge. The objectives of the study are: I. To examine whether there is a short-term shift in autonomic balance to the parasympathetic branch of the ANS and ability of the cardiovascular and respiratory respiratory systems to flexibly adapt to acute psychological challenge following sessions in pregnancy. II. To investigate potential long- term effects of yoga practice during pregnancy on HRV and cardio-respiratory synchronisation following acute psychological challenge.
Systemic arterial hypertension (SAH) has a direct association with endothelial dysfunction and major cardiovascular events. Evidence points to possible benefits of aerobic training in the endothelial function analyzed by the flow mediated dilation technique (flow mediated dilatation - FMD) in individuals with SAH. However, little is known about the influence of the autonomic nervous system (ANS) on the results of brachial artery FMD after different types of acute exercise in individuals with SAH. Thus, the objective of the research is to analyze the influence of the ANS on the FMD of the brachial artery of individuals with SAH after a session of aerobic (EA), resistance (ER) and combined (EC) exercise. For this, thirty-nine hypertensive individuals aged 35 to 55 years will be recruited and will be randomized to 2 sessions of AS, ER or EC. Also, within each modality, they will be randomized to α1-adrenergic block (Doxazosin 0.05 mg / kg-1) or placebo. The FMD will be performed by ultrasound 10 minutes before, as well as 10, 40 and 70 minutes after the exercise sessions and the autonomic control will be monitored (Finometer) for 10 minutes before each FMD. Arterial stiffness will also be analyzed, using the pulse wave velocity (PWV) by the Complior Analyzer. It is expected to demonstrate with this research the influence of the ANS on the FMD of the brachial artery in individuals with SAH in different physical exercises. This knowledge contributes to a better training prescription in this population.