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https://www.readbyqxmd.com/read/28718814/physiological-effects-of-touching-wood
#1
Harumi Ikei, Chorong Song, Yoshifumi Miyazaki
This study aimed to clarify the physiological effects of touching wood with the palm, in comparison with touching other materials on brain activity and autonomic nervous activity. Eighteen female university students (mean age, 21.7  ±  1.6 years) participated in the study. As an indicator of brain activity, oxyhemoglobin (oxy-Hb) concentrations were measured in the left/right prefrontal cortex using near-infrared time-resolved spectroscopy. Heart rate variability (HRV) was used as an indicator of autonomic nervous activity...
July 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28717064/sildenafil-improves-heart-rate-variability-in-dogs-with-asymptomatic-myxomatous-mitral-valve-degeneration
#2
Prapawadee Pirintr, Nakkawee Saengklub, Vudhiporn Limprasutr, Suwanakiet Sawangkoon, Anusak Kijtawornrat
Myxomatous mitral valve degeneration (MMVD) causes an imbalance of sympathovagal activity resulted in poor cardiac outcomes. Phosphodiesterase-5 inhibitors have been revealed cardioprotective effect in patients with heart diseases. This study aimed to 1) compare the heart rate variability (HRV) between asymptomatic MMVD and healthy dogs and 2) assess long-term effects of sildenafil and enalapril on time- and frequency-domains analyzes. Thirty-four dogs with MMVD stage B1 or B2 and thirteen healthy dogs were recruited into the study...
July 17, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28715351/interacting-influences-of-gender-and-chronic-pain-status-on-parasympathetically-mediated-heart-rate-variability-in-adolescents-and-young-adults
#3
Lynn S Walker, Amanda L Stone, Craig A Smith, Stephen Bruehl, Judy Garber, Martina Puzanovova, André Diedrich
Considerable research links chronic pain to autonomic nervous system (ANS) dysfunction, specifically low heart rate variability (HRV) mediated by reduced parasympathetic activity. However, little is known about factors that influence ANS function in chronic pain. The ANS is the primary pathway for brain-gut communication, making it of particular interest in gastrointestinal disorders, such as irritable bowel syndrome, characterized by functional abdominal pain (FAP). We evaluated the relation of sex, pain severity, and psychological stress to ANS function in adolescents/young adults from a database of pediatric FAP and control participants enrolled 8 years earlier in a prospective study of pain...
August 2017: Pain
https://www.readbyqxmd.com/read/28711846/vascular-and-cardiac-autonomic-function-and-pm2-5-constituents-among-the-elderly-a-longitudinal-study
#4
Youn-Hee Lim, Hyun-Joo Bae, Seung-Muk Yi, EunHa Park, Bo-Eun Lee, Yun-Chul Hong
BACKGROUND: Although epidemiologic studies have shown an association between the total mass of particulate matter <2.5μm in aerodynamic diameter (PM2.5) and cardiovascular disease, few studies have examined PM2.5 constituents associated with vascular and cardiac autonomic dysfunction. METHODS: In this longitudinal study, we investigated the relationship between PM2.5 constituents and blood pressure (BP), and markers of the autonomic nervous system. In 466 elderly subjects residing in communities in Seoul, Korea, we examined 16 constituents, seven sources, and total mass concentrations of PM2...
July 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28708775/continuous-cardiac-autonomic-and-hemodynamic-responses-to-isometric-exercise
#5
Katrina A Taylor, Jonathan D Wiles, Damian D Coleman, Rajan Sharma, Jamie M Oʼdriscoll
PURPOSE: Elevated arterial blood pressure (BP) is associated with autonomic dysfunction and impaired hemodynamic control mechanisms. Isometric exercise (IE) training has been demonstrated effective at reducing BP; however, the continuous cardiovascular responses during IE are underinvestigated. We hypothesized that reflex autonomic cardiovascular control is an important mediator in reducing BP. To test our hypothesis, we investigated continuous cardiac autonomic modulation and baroreceptor reflex sensitivity (BRS) in response to IE...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28707558/effect-of-unconjugated-hyperbilirubinemia-on-neonatal-autonomic-functions-evaluation-by-heart-rate-variability
#6
Rahmi Ozdemir, Ozgur Olukman, Cem Karadeniz, Kiymet Celik, Nagehan Katipoglu, Murat Muhtar Yilmazer, Sebnem Calkavur, Timur Mese, Sertac Arslanoglu
BACKGROUND: Beyond the physiological levels of bilirubin may leads to alterations in autonomic regulation. Heart rate variability (HRV), is a noninvasive and quantitative marker of the activity of the autonomic nervous system (ANS). To date, few studies have been evaluated the undesirable effects of severe unconjugated hyperbilirubinemia (UHB) on autonomic functions, and only one study has used HRV as a marker of the autonomic activity. However, the relationship between altered cardiac autonomic functions and UHB by using the HRV derived from 24-hour Holter electrocardiography (ECG) recording previously...
July 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28700617/a-new-analysis-of-heart-rate-variability-in-the-assessment-of-fetal-parasympathetic-activity-an-experimental-study-in-a-fetal-sheep-model
#7
C Garabedian, C Champion, E Servan-Schreiber, L Butruille, E Aubry, D Sharma, R Logier, P Deruelle, L Storme, V Houfflin-Debarge, J De Jonckheere
Analysis of heart rate variability (HRV) is a recognized tool in the assessment of autonomic nervous system (ANS) activity. Indeed, both time and spectral analysis techniques enable us to obtain indexes that are related to the way the ANS regulates the heart rate. However, these techniques are limited in terms of the lack of thresholds of the numerical indexes, which is primarily due to high inter-subject variability. We proposed a new fetal HRV analysis method related to the parasympathetic activity of the ANS...
2017: PloS One
https://www.readbyqxmd.com/read/28699082/combat-stress-decreases-memory-of-warfighters-in-action
#8
Rosa Delgado-Moreno, José Juan Robles-Pérez, Vicente Javier Clemente-Suárez
The present research aimed to analyze the effect of combat stress in the psychophysiological response and attention and memory of warfighters in a simulated combat situation. Variables of blood oxygen saturation, heart rate, blood glucose, blood lactate, body temperature, lower body muscular strength manifestation, cortical arousal, autonomic modulation, state anxiety and memory and attention through a postmission questionnaire were analyzed before and after a combat simulation in 20 male professional Spanish Army warfighters...
August 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28691853/assessment-of-cardiac-autonomic-tone-following-long-sudarshan-kriya-yoga-in-art-of-living-practitioners
#9
Lakshmi Bhaskar, Chhaya Kharya, K K Deepak, Vinod Kochupillai
OBJECTIVE: The breathing processes are known to modulate cardiac autonomic tone and improve psychological status. We investigated cardiac autonomic tone following long Sudarshan Kriya Yoga (SKY) using heart rate variability (HRV) and skin conductance level (SCL). METHODS: Thirty healthy volunteers (age 28.3 ± 8.4 years; 23 M: 7 F) participated in the study. Electrocardiogram (ECG) and SCL were recorded for 5 min each, before and after long SKY. Long SKY is a combination of pranayama and cyclic rhythmic breathing and is performed by following the guided audio instructions...
July 10, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28690894/gender-differences-in-heart-rate-variability-among-individuals-undergoing-regular-resistance-training-preliminary-observations
#10
Ellen S V Ramalho, Estevam L Souza-Junior, Marciane Magnani, Valdir A Braga
OBJECTIVES: Frequency-domain analysis of heart rate variability (HRV) is an effective tool to evaluate autonomic balance. This study aimed to investigate gender differences in HRV among individuals undergoing regular resistance training. METHODS: This preliminary cross-sectional study was conducted from April to September 2016 in João Pessoa, Paraíba, Brazil. The low-frequency (LF), high-frequency (HF) and LF/HF ratio components of HRV spectral analysis were analysed among 22 men and 27 women undergoing regular resistance training...
May 2017: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/28687367/the-relationship-between-erythrocyte-membrane-fatty-acid-levels-and-cardiac-autonomic-function-in-obese-children
#11
Gulgun Mustafa, Fidanci Muzaffer Kursat, Tas Ahmet, Genc Fatih Alparslan, Gunes Omer, Erdem Sertoglu, Sarı Erkan, Yesilkaya Ediz, Turker Turker, Kılıc Ayhan
OBJECTIVE: Childhood obesity is a worldwide health concern. Studies have shown autonomic dysfunction in obese children. The exact mechanism of this dysfunction is still unknown. The aim of this study was to assess the relationship between erythrocyte membrane fatty acid (EMFA) levels and cardiac autonomic function in obese children using heart rate variability (HRV). METHODS: A total of 48 obese and 32 healthy children were included in this case-control study. Anthropometric and biochemical data, HRV indices, and EMFA levels in both groups were compared statistically...
July 4, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28675811/effects-of-expansion-sphincter-pharyngoplasty-on-the-apnea-hypopnea-index-and-heart-rate-variability
#12
Ahmet Emre Süslü, Gözde Pamuk, Ahmet Erim Pamuk, Serdar Özer, Shamkhal Jafarov, T Metin Önerci
PURPOSE: Heart rate variability (HRV) is a noninvasive and sensitive method used to evaluate autonomic function of the heart based on specific polysomnographic parameters. This study aimed to determine the effect of expansion sphincter pharyngoplasty (ESP) on HRV and the apnea-hypopnea index (AHI) in patients with obstructive sleep apnea (OSA). MATERIALS AND METHODS: This retrospective cohort study included patients who presented to the Department of Otorhinolaryngology, Hacettepe University Hospital (Ankara, Turkey), were diagnosed with OSA, and underwent ESP...
June 10, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28659811/resolving-ambiguities-in-the-lf-hf-ratio-lf-hf-scatter-plots-for-the-categorization-of-mental-and-physical-stress-from-hrv
#13
Wilhelm von Rosenberg, Theerasak Chanwimalueang, Tricia Adjei, Usman Jaffer, Valentin Goverdovsky, Danilo P Mandic
It is generally accepted that the activities of the autonomic nervous system (ANS), which consists of the sympathetic (SNS) and parasympathetic nervous systems (PNS), are reflected in the low- (LF) and high-frequency (HF) bands in heart rate variability (HRV)-while, not without some controversy, the ratio of the powers in those frequency bands, the so called LF-HF ratio (LF/HF), has been used to quantify the degree of sympathovagal balance. Indeed, recent studies demonstrate that, in general: (i) sympathovagal balance cannot be accurately measured via the ratio of the LF- and HF- power bands; and (ii) the correspondence between the LF/HF ratio and the psychological and physiological state of a person is not unique...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28652061/resting-heart-rate-predicts-depression-and-cognition-early-after-ischemic-stroke-a-pilot-study
#14
Arnaud Tessier, Igor Sibon, Mathilde Poli, Michel Audiffren, Michèle Allard, Micha Pfeuty
BACKGROUND: Early detection of poststroke depression (PSD) and cognitive impairment (PSCI) remains challenging. It is well documented that the function of autonomic nervous system is associated with depression and cognition. However, their relationship has never been investigated in the early poststroke phase. This pilot study aimed at determining whether resting heart rate (HR) parameters measured in early poststroke phase (1) are associated with early-phase measures of depression and cognition and (2) could be used as new tools for early objective prediction of PSD or PSCI, which could be applicable to patients unable to answer usual questionnaires...
June 23, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28646783/heart-rate-variability-in-patients-with-major-depression-disorder-during-a-clinical-autonomic-test
#15
Xiuwen Chen, Rongqian Yang, Danni Kuang, Lei Zhang, Ruixue Lv, Xiong Huang, Fengchun Wu, Guohui Lao, Shanxing Ou
Major depression disorder (MDD) patients express dysfunction autonomic nervous system (ANS) and reduced heart rate variability (HRV). However, previous researches mainly focused on examining resting state without considering a series of stimulation tests of ANS between MDD patients and healthy people. For this purpose, 40 healthy people and 40 MDD patients participated and finished 10min clinical autonomic test-Ewing test. Parameters of HRV such as time domain, frequency domain, and nonlinear dynamical parameters were calculated...
June 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28640758/consecutive-ultra-short-term-heart-rate-variability-to-track-dynamic-changes-in-autonomic-nervous-system-during-and-after-exercise
#16
Xiang Chen, Ruijie Yao, Gezhen Yin, Jin Li
OBJECTIVE: Quantitative measurement of the dynamic changes in autonomic nervous system (ANS) during and after exercise has great significance in clinical, sports training and other fields. A consecutive ultra-short-term (30 s, UST) heart rate variability (HRV) method was proposed to track the exercise-induced autonomic control of heart rate (HR). APPROACH: Twenty-three healthy young men participated in the study. The first four stages of the Modified Bruce Protocol (S0-S3) were performed...
June 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28637038/synergic-impact-of-vascular-calcification-and-low-autonomic-tone-in-mortality-of-hemodialysis-patients
#17
Hwee-Yeong Ng, Shu-Kai Hsueh, Yueh-Ting Lee, Terry Ting-Yu Chiou, Pei-Chen Huang, Chien-Te Lee
BACKGROUND: Both cardiovascular calcification and autonomic dysfunction are frequently encountered in hemodialysis patients. We aimed to investigate the relationship between cardiovascular calcification and heart rate variability (HRV) and their influence on long-term outcome. METHODS: Seventy-eight hemodialysis patients underwent echocardiogram and radiography of the pelvis and hands to identify valvular and vascular calcification. HRV was evaluated using a commercial machine...
June 22, 2017: Nephron
https://www.readbyqxmd.com/read/28618917/reduced-cardiovascular-activation-following-chronic-stress-in-caregivers-of-people-with-anorexia-nervosa
#18
Ángel Romero-Martínez, Luis Moya-Albiol
Caring for offspring diagnosed with eating disorders (EDs) puts caregivers under high levels of chronic stress, which have negative consequences for their health. Unfortunately, caregivers have received little attention from mental health professionals. Chronic stress experienced by informal caregivers has been associated with the alteration of body homeostasis, and therefore, the functioning of various physiological systems. This could be the basis of health problems in informal caregivers of people with EDs...
July 3, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28617680/pulse-photoplethysmographic-amplitude-and-heart-rate-variability-during-laparoscopic-cholecystectomy-a-prospective-observational-study
#19
Riccardo Colombo, Ferdinando Raimondi, Alberto Corona, Andrea Marchi, Beatrice Borghi, Simone Pellegrin, Paola Bergomi, Tommaso Fossali, Stefano Guzzetti, Alberto Porta
BACKGROUND: Surgical stress affects the autonomic nervous system by increasing sympathetic outflow. One method of monitoring sympathetic activity is pulse photoplethysmographic analysis. From this two indices can be derived - autonomic nervous system state (ANSS) and ANSS index (ANSSi). It has recently been claimed that these indices can be used to measure sympathetic activity in anaesthetised patients, but their validity has not yet been demonstrated. OBJECTIVE: To measure changes in pulse photoplethysmographic indices and determine any agreement with autonomic nervous system modulation of the cardiovascular system in healthy study participants during surgery under general anaesthesia...
August 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28594089/validity-of-spectral-analysis-based-on-heart-rate-variability-from-1-minute-or-less-ecg-recordings
#20
Naomi Takahashi, Akira Kuriyama, Hoshinori Kanazawa, Yoshimitsu Takahashi, Takeo Nakayama
BACKGROUND: To broaden the utility of heart rate variability (HRV) in clinical medicine and mass screening, results based on shorter electrocardiogram (ECG) recordings require validation with those based on standard five-minute recordings. We investigated the association between HRV variables obtained from five-minute ECGs with those obtained from ECGs shorter than five minutes. METHODS: Twenty-two participants aged 20 to 69 years underwent five-minute resting ECG recordings in the supine position with natural breathing...
June 8, 2017: Pacing and Clinical Electrophysiology: PACE
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