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https://www.readbyqxmd.com/read/28442987/compression-at-myofascial-trigger-point-on-chronic-neck-pain-provides-pain-relief-through-the-prefrontal-cortex-and-autonomic-nervous-system-a-pilot-study
#1
Yoshiki Morikawa, Kouich Takamoto, Hiroshi Nishimaru, Toru Taguchi, Susumu Urakawa, Shigekazu Sakai, Taketoshi Ono, Hisao Nishijo
Compression at myofascial trigger points (MTrPs), known as "ischemic compression," has been reported to provide immediate relief of musculoskeletal pain and reduce the sympathetic activity that exacerbates chronic pain. We conducted a pilot study to investigate the possible involvement of the prefrontal cortex in pain relief obtained by MTrP compression in the present study, and analyzed the relationships among prefrontal hemodynamic activity, activity of the autonomic nervous system, and subjective pain in patients with chronic neck pain, with and without MTrP compression...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28436399/identification-of-patients-with-preeclampsia-from-normal-subjects-using-wavelet-based-spectral-analysis-of-heart-rate-variability
#2
A Hossen, A Barhoum, D Jaju, V Gowri, K Al-Hashmi, M O Hassan, L Al-Kharusi
BACKGROUND: The spectral analysis of the heart rate variability (HRV) shows a decrease in the power of the high frequency (HF) component in preeclamptic pregnancy compared with normal pregnancy; such a decrease is associated with an increase in the low frequency (LF) and the very low frequency (VLF) power. The physiological interpretation is that preeclamptic pregnancy is associated with a facilitation of sympathetic regulation and an attenuation of parasympathetic influence of HR compared with non-pregnancy and normal pregnancy...
April 14, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28431533/effect-of-a-16-week-bikram-yoga-program-on-heart-rate-variability-and-associated-cardiovascular-disease-risk-factors-in-stressed-and-sedentary-adults-a-randomized-controlled-trial
#3
Zoe L Hewett, Kate L Pumpa, Caroline A Smith, Paul P Fahey, Birinder S Cheema
BACKGROUND: Chronic activation of the stress-response can contribute to cardiovascular disease risk, particularly in sedentary individuals. This study investigated the effect of a Bikram yoga intervention on the high frequency power component of heart rate variability (HRV) and associated cardiovascular disease (CVD) risk factors (i.e. additional domains of HRV, hemodynamic, hematologic, anthropometric and body composition outcome measures) in stressed and sedentary adults. METHODS: Eligible adults were randomized to an experimental group (n = 29) or a no treatment control group (n = 34)...
April 21, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28428900/asymptomatic-severe-vagal-and-sympathetic-cardiac-denervation-in-holmes-adie-s-syndrome
#4
B Estañol, R C Callejas-Rojas, S Cortés, R Martínez-Memije, O Infante-Vázquez, G Delgado-García
A 40-year-old woman was found to have bilateral Adie's pupils and generalized muscle stretch areflexia. She did not have orthostatic hypotension but, in an ECG strip in the office, she appeared to have an almost fixed heart rate. We thus studied the heart rate variability (HRV) and the systolic blood pressure variability (SBPV) in supine and standing position and also during rhythmic breathing. We found a decreased HRV in the time domain with very low standard deviation in supine and standing position and during rhythmic breathing...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28418725/medex-2015-heart-rate-variability-predicts-development-of-acute-mountain-sickness
#5
Angus Sutherland, Joseph Freer, Laura Evans, Alberto Dolci, Matteo Crotti, Jamie Hugo Macdonald
Sutherland, Angus, Joseph Freer, Laura Evans, Alberto Dolci, Matteo Crotti, and Jamie Hugo Macdonald. MEDEX 2015: Heart rate variability predicts development of acute mountain sickness. High Alt Med Biol 00:000-000, 2017. AIMS: Acute mountain sickness (AMS) develops when the body fails to acclimatize to atmospheric changes at altitude. Preascent prediction of susceptibility to AMS would be a useful tool to prevent subsequent harm. Changes to peripheral oxygen saturation (SpO2) on hypoxic exposure have previously been shown to be of poor predictive value...
April 18, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28416902/a-first-look-into-the-influence-of-triathlon-wetsuit-on-resting-blood-pressure-and-heart-rate-variability
#6
A Prado, J Dufek, J Navalta, N Lough, J Mercer
The purpose of this study was to investigate the effects of wearing a wetsuit on resting cardiovascular measures (blood pressure (BP), heart rate variability (HRV)). The influence of position (upright, prone) and wetsuit size were also explored. Participants (n=12 males, 33.3±12.1 years) had BP and HRV measured during six resting conditions: standing or prone while not wearing a wetsuit (NWS), wearing the smallest (SWS), or largest (LWS) wetsuit (based upon manufacturer guidelines). Heart rate was recorded continuously over 5-mins; BP was measured three times per condition...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28406035/diagnostic-accuracy-of-random-ecg-in-primary-care-for-early-asymptomatic-cardiac-autonomic-neuropathy
#7
Herbert F Jelinek, Marc T P Adam, Robert Krones, David J Cornforth
AIMS: Cardiac autonomic reflex tests (CARTs) are time consuming and require patient cooperation for detecting cardiac autonomic neuropathy (CAN). Heart rate variability (HRV) analysis requires less patient cooperation and is quicker to complete. However the reliability of HRV results as a clinical tool, with respect to length of recording and accuracy of diagnosis is inconclusive. The current study investigated the reproducibility associated with varying length of recording for early CAN (eCAN) assessment...
April 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28400498/effect-of-thoracic-epidural-anesthesia-on-heart-rate-variability-in-a-porcine-model
#8
Arjun Mahajan, Tatsuo Takamiya, Peyman Benharash, Wei Zhou
Heart rate variability (HRV) is increasingly recognized as a means of evaluating autonomic tone. Thoracic epidural anesthesia (TEA) has been previously demonstrated to suppress the electrical storms in patients. However, the effect of TEA on HRV during sympathoexcitation remains unknown. In this study, we aimed to determine the effects of TEA on HRV response to left stellate ganglion stimulation (LSS) in a porcine model. In 12 anesthetized pigs after insertion of an epidural catheter to T1 level, a median sternotomy was performed to expose the heart and the left stellate ganglion...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28396189/external-counterpulsation-increases-beat-to-beat-heart-rate-variability-in-patients-with-ischemic-stroke
#9
Li Xiong, Ge Tian, Li Wang, Wenhua Lin, Xiangyan Chen, Thomas Wai Hong Leung, Yannie Oi Yan Soo, Lawrence Ka Sing Wong
BACKGROUND AND PURPOSE: External counterpulsation (ECP) is a noninvasive method used to augment cerebral perfusion in ischemic stroke. However, the response of beat-to-beat heart rate variability (HRV) in patients with ischemic stroke during ECP remains unknown. METHODS: Forty-eight patients with unilateral ischemic stroke at the subacute stage and 14 healthy controls were recruited. Beat-to-beat heart rate before, during, and after ECP was monitored. The frequency components of HRV were calculated using power spectral analysis...
April 7, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28396041/association-of-holter-derived-heart-rate-variability-parameters-with-the-development-of-congestive-heart-failure-in-the-cardiovascular-health-study
#10
Vaiibhav N Patel, Brian R Pierce, Rohan K Bodapati, David L Brown, Diane G Ives, Phyllis K Stein
OBJECTIVES: This study sought to determine whether Holter-based parameters of heart rate variability (HRV) are independently associated with incident heart failure among older adults in the CHS (Cardiovascular Health Study) as evidenced by an improvement in the predictive power of the Health Aging and Body Composition Heart Failure (Health ABC) score. BACKGROUND: Abnormal HRV, a marker of autonomic dysfunction, has been associated with multiple adverse cardiovascular outcomes but not the development of congestive heart failure (CHF)...
March 30, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28385683/the-multimodal-assessment-of-adult-attachment-security-developing-the-biometric-attachment-test
#11
Federico Parra, Raphaële Miljkovitch, Gwenaelle Persiaux, Michelle Morales, Stefan Scherer
BACKGROUND: Attachment theory has been proven essential for mental health, including psychopathology, development, and interpersonal relationships. Validated psychometric instruments to measure attachment abound but suffer from shortcomings common to traditional psychometrics. Recent developments in multimodal fusion and machine learning pave the way for new automated and objective psychometric instruments for adult attachment that combine psychophysiological, linguistic, and behavioral analyses in the assessment of the construct...
April 6, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28384912/assessment-of-autonomic-dysfunction-in-acute-stroke-patients-at-a-tertiary-care-hospital
#12
Hemachandrika Chidambaram, Kothai Gnanamoorthy, Prasanna Karthik Suthakaran, Kannan Rajendran, Chitrambalam Pavadai
INTRODUCTION: In patients who present with acute cerebro-vascular disease, autonomic function testing is usually not given its due importance. This is because of the complex nature of the autonomic function tests and the relative technical difficulty faced in administering the tests to the patients. A simple and non-invasive method to assess the autonomic dysfunction is measurement of resting Heart Rate Variability (HRV). AIM: To study the pattern of autonomic dysfunction among patients admitted with acute stroke and to study the relationship between autonomic dysfunction and the morbidity and mortality associated with acute stroke...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28376079/pattern-of-brain-injury-and-depressed-heart-rate-variability-in-newborns-with-hypoxic-ischemic-encephalopathy
#13
Marina Metzler, Rathinaswamy Govindan, Tareq Al-Shargabi, Gilbert Vezina, Nickie Andescavage, Yunfei Wang, Adre du Plessis, An N Massaro
BACKGROUND: Decreased heart rate variability (HRV) is a measure of autonomic dysfunction and brain injury in newborns with hypoxic ischemic encephalopathy (HIE). This study aimed to characterize the relationship between HRV and brain injury pattern by MRI in newborns with HIE undergoing therapeutic hypothermia. METHODS: HRV metrics were quantified in the time domain (αS, αL, and root mean square at short [RMSS] and long [RMSL] time scales) and frequency domain (relative low-[LF] and high-frequency [HF] power) during the time period 24-27 h of life...
April 4, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28371898/longitudinal-association-of-short-term-metronome-paced-heart-rate-variability-and-echocardiographically-assessed-cardiac-structure-at-a-4-year-follow-up-results-from-the-prospective-population-based-carla-cohort
#14
Daniel Medenwald, Cees A Swenne, Stefan Frantz, Sebastian Nuding, Jan A Kors, Diana Pietzner, Daniel Tiller, Karin H Greiser, Alexander Kluttig, Johannes Haerting
Aims: To assess the value of cardiac structure/function in predicting heart rate variability (HRV) and the possibly predictive value of HRV on cardiac parameters. Methods and results: Baseline and 4-year follow-up data from the population-based CARLA cohort were used (790 men, 646 women, aged 45-83 years at baseline and 50-87 years at follow-up). Echocardiographic and HRV recordings were performed at baseline and at follow-up. Linear regression models with a quadratic term were used...
March 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28367952/b-vitamin-supplementation-mitigates-effects-of-fine-particles-on-cardiac-autonomic-dysfunction-and-inflammation-a-pilot-human-intervention-trial
#15
Jia Zhong, Letizia Trevisi, Bruce Urch, Xinyi Lin, Mary Speck, Brent A Coull, Gary Liss, Aaron Thompson, Shaowei Wu, Ander Wilson, Petros Koutrakis, Frances Silverman, Diane R Gold, Andrea A Baccarelli
Ambient fine particle (PM2.5) pollution triggers acute cardiovascular events. Individual-level preventions are proposed to complement regulation in reducing the global burden of PM2.5-induced cardiovascular diseases. We determine whether B vitamin supplementation mitigates PM2.5 effects on cardiac autonomic dysfunction and inflammation in a single-blind placebo-controlled crossover pilot trial. Ten healthy adults received two-hour controlled-exposure-experiment to sham under placebo, PM2.5 (250 μg/m(3)) under placebo, and PM2...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28366178/a-comparison-of-heart-rate-variability-n-3-pufa-status-and-lipid-mediator-profile-in-age-and-bmi-matched-middle-aged-vegans-and-omnivores
#16
COMPARATIVE STUDY
Ana M Pinto, Thomas A B Sanders, Alexandra C Kendall, Anna Nicolaou, Robert Gray, Haya Al-Khatib, Wendy L Hall
Low heart rate variability (HRV) predicts sudden cardiac death. Long-chain (LC) n-3 PUFA (C20-C22) status is positively associated with HRV. This cross-sectional study investigated whether vegans aged 40-70 years (n 23), whose diets are naturally free from EPA (20 : 5n-3) and DHA (22 : 6n-3), have lower HRV compared with omnivores (n 24). Proportions of LC n-3 PUFA in erythrocyte membranes, plasma fatty acids and concentrations of plasma LC n-3 PUFA-derived lipid mediators were significantly lower in vegans...
March 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28350715/continuous-cardiac-autonomic-and-haemodynamic-responses-to-isometric-exercise
#17
Katrina A Taylor, Jonathan D Wiles, Damian D Coleman, Rajan Sharma, Jamie M O'Driscoll
PURPOSE: Elevated arterial blood pressure (BP) is associated with autonomic dysfunction and impaired haemodynamic 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...
March 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28344732/autonomic-modulation-in-older-women-using-resistance-exercise-as-a-countermeasure
#18
Hayden Gerhart, Yu Lun Tai, Curtis Fennell, Xián Mayo, J Derek Kingsley
It is unclear if resistance training (RT) can be used to alter declines in autonomic modulation associated with aging. Young women (YW; range 18-25 yrs) and older women (OW; range 50-72 yrs) were compared at baseline. Only OW underwent supervised RT 2 days a week for 12-weeks. Baseline and post-training measurements included heart rate variability (HRV) and complexity (Sample Entropy) to assess autonomic modulation. The 12-weeks of RT consisted of 9 exercises performing 3 sets of 8-12 repetitions. At baseline, group differences in maximal strength, and autonomic modulation were evaluated with a one-way ANOVA with BMI as a covariate...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28331306/is-cardiac-autonomic-modulation-during-upper-limb-isometric-contraction-and-valsalva-maneuver-impaired-in-copd-patients
#19
Cássia da Luz Goulart, Ramona Cabiddu, Paloma de Borba Schneiders, Elisabete Antunes San Martin, Renata Trimer, Audrey Borghi-Silva, Andréa Lúcia Gonçalves da Silva
PURPOSE: To evaluate the heart rate variability (HRV) indices and heart rate (HR) responses during isometric contraction (IC) and Valsalva maneuver (VM) in COPD patients. METHODS: Twenty-two stable moderate to severe COPD patients were evaluated. R-R intervals were recorded (monitor Polar(®) S810i) during dominant upper limb IC (2 minutes). Stable signals were analyzed by Kubios HRV(®) software. Indices of HRV were computed in the time domain (mean HR; square root of the mean squared differences of successive RR intervals [RMSSD] and HRV triangular index [RR tri index]) and in the frequency domain (high frequency [HF]; low frequency [LF] and LF/HF ratio)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28325020/socioeconomic-status-age-and-heart-rate-variability-in-a-bangladeshi-community
#20
Nishat E-Sharmin Trisha, Herbert F Jelinek, Mika P Tarvainen, David J Cornforth, Dewan S Alam, Megan Smith
Socioeconomic status (SES) is a risk factor for cardiovascular disease (CVD) and either low or high heart rate variability (HRV) at rest has been shown to predict cardiovascular morbidity and mortality. The study investigated the extent HRV features can predict SES. Four hundred and twenty eight people were randomly selected from the commercial districts (high SES) and slum areas (low SES) within Dhaka city. Demographic, clinical, and HRV features were recorded. Of the clinical variables age, waist circumference and diastolic blood pressure (p<;0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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