keyword
MENU ▼
Read by QxMD icon Read
search

HRV

keyword
https://www.readbyqxmd.com/read/29457680/chronic-lead-exposure-enhances-the-sympathoexcitatory-response-associated-with-p2x4-receptor-in-rat-stellate-ganglia
#1
Gaochun Zhu, Zhenying Chen, Bo Dai, Chaoran Zheng, Huaide Jiang, Yurong Xu, Xuan Sheng, Jingjing Guo, Yu Dan, Shangdong Liang, Guilin Li
Chronic lead exposure causes peripheral sympathetic nerve stimulation, including increased blood pressure and heart rate. Purinergic receptors are involved in the sympathoexcitatory response induced by myocardial ischemia injury. However, whether P2X4 receptor participates in sympathoexcitatory response induced by chronic lead exposure and the possible mechanisms are still unknown. The aim of this study was to explore the change of the sympathoexcitatory response induced by chronic lead exposure via the P2X4 receptor in the stellate ganglion (SG)...
February 19, 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/29455900/heart-rate-variability-is-associated-with-psychosocial-stress-in-distinct-social-domains
#2
Alexander Lischke, Robert Jacksteit, Anett Mau-Moeller, Rike Pahnke, Alfons O Hamm, Matthias Weippert
OBJECTIVE: Psychosocial stress is associated with substantial morbidity and mortality. Accordingly, there is a growing interest in biomarkers that indicate whether individuals show adaptive (i.e., stress-buffering and health-promoting) or maladaptive (i.e., stress-escalating and health-impairing) stress reactions in social contexts. As heart rate variability (HRV) has been suggested to be a biomarker of adaptive behavior during social encounters, it may be possible that inter-individual differences in HRV are associated with inter-individual differences regarding stress in distinct social domains...
March 2018: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29453470/nerve-conduction-and-heart-rate-variability-in-patients-with-hypothyroidism-at-a-tertiary-care-centre-in-eastern-nepal
#3
Shital Gupta, Rita Khadka, Dilip Thakur, Robin Maskey, K D Mehta, B H H Paudel
INTRODUCTION: Thyroid hormone effects on many organs including central and peripheral nervous systems. However, these hormones do not affect all systems/organs to a similar extent. Thus, we conducted this study to explore the effect of thyroid hormones on somatic nervous system assessed by Nerve conduction study and cardiac autonomic activity assessed by heart rate variability. METHODS: The study included newly diagnosed hypothyroid patients and healthy controls...
October 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/29451048/impact-of-radon-and-combinatory-radon-carbon-dioxide-spa-on-pain-and-hypertension-results-from-the-explorative-rad-on01-study
#4
Paul F Rühle, Gerhart Klein, Tatjana Rung, Hong Tiep Phan, Claudia Fournier, Rainer Fietkau, Udo S Gaipl, Benjamin Frey
OBJECTIVES: Therapies with low doses of radon have beneficial effects on patients suffering from chronic painful degenerative and inflammatory diseases. We already showed that this is accompanied by systemic immune modulations. We here focus on pain reducing effects of very low doses of radon by adding carbon dioxide water and its impact on heart rate variability (HRV), blood pressure and free radicals. METHODS: 100 patients receiving radon spa (1.200 Bq/l at 34°C or 600 Bq/l, 1 g/l CO 2 at 34°C) were monitored before and at three different time points after therapy...
February 16, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29449080/influence-of-exercise-modality-on-cardiac-parasympathetic-and-sympathetic-indices-during-post-exercise-recovery
#5
Scott Michael, Ollie Jay, Kenneth S Graham, Glen M Davis
OBJECTIVES: This study investigated indirect measures of post-exercise parasympathetic reactivation (using heart-rate-variability, HRV) and sympathetic withdrawal (using systolic-time-intervals, STI) following upper- and lower-body exercise. DESIGN: Randomized, counter-balanced, crossover. METHODS: 13 males (age 26.4±4.7years) performed maximal arm-cranking (MAX-ARM) and leg-cycling (MAX-LEG). Subsequently, participants undertook separate 8-min bouts of submaximal HR-matched exercise of each mode (ARM and LEG)...
February 12, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29447989/aetiology-of-lower-respiratory-tract-infection-in-adults-in-primary-care-a-prospective-study-in-11-european-countries
#6
Margareta Ieven, Samuel Coenen, Katherine Loens, Christine Lammens, Frank Coenjaerts, Anouk Vanderstraeten, Birgitta Henriques-Normark, Derrick Crook, Kris Huygen, Chris C Butler, Theo Jm Verheij, Paul Little, Kalina Zlateva, Anton van Loon, Eric Cj Claas, Herman Goossens
OBJECTIVES: To describe the role of bacteria (including bacterial resistance), viruses (including those recently described), and mixed bacterial-viral infections in adults presenting to primary care with lower respiratory tract infection (LRTI). METHODS: We enrolled 3104 adults with LRTI, 141 (4.5%) of whom had community-acquired pneumonia (CAP), and 2985 matched controls in a prospective study in 16 primary care networks in Europe, and followed patients up at 28-35 days...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29447199/short-term-repeated-hrv-16-exposure-results-in-an-attenuated-immune-response-in-vivo-in-humans
#7
Rebecca M Koch, Matthijs Kox, Corné van den Kieboom, Gerben Ferwerda, Jelle Gerretsen, Sandra Ten Bruggencate, Johannes G van der Hoeven, Marien I de Jonge, Peter Pickkers
INTRODUCTION: Naturally, development of adaptive immunity following HRV infection affects the immune response. However, it is currently unclear whether or not HRV re-exposure within a short time frame leads to an altered innate immune response. The "experimental cold model" is used to investigate the pathogenesis of HRV infection and allows us to investigate the effects of repeated exposure on both local and systemic innate immunity. METHODS: 40 healthy male and female (1:1) subjects were nasally inoculated with HRV-16 or placebo...
2018: PloS One
https://www.readbyqxmd.com/read/29447081/is-neuropathic-pain-associated-with-cardiac-sympathovagal-activity-changes-in-patients-with-breast-cancer
#8
Hilal Yesil, Sibel Eyigor, Meral Kayıkcıoglu, Ruchan Uslu, Menekse Inbat, Benay Ozbay
Objective Heart rate variability (HRV) is a good indicator of the autonomic nervous system (ANS) activity. A few studies have been conducted recently and have shown a relationship between reduced HRV and conditions that lead to neuropathic pain (NP). In this study, we aimed to investigate whether NP is associated with changes in cardiac sympathovagal activity in patients with breast cancer (BC). Methods We used the Leeds Assessment of Neuropathic Symptoms and Signs (LANSS) questionnaire to evaluate NP in 70 patients with BC...
February 15, 2018: Neurological Research
https://www.readbyqxmd.com/read/29446483/adenovirus-types-associated-with-severe-respiratory-diseases-a-retrospective-four-year-study-in-kuwait
#9
Wassim Chehadeh, Anfal Al-Adwani, Sonia Elezebeth John, Shaikhah Al-Dhufairi, Hessa Al-Dousari, Maha Alkhaledi, Widad Al-Nakib
Human adenovirus (HAdV) infection can result in a severe respiratory disease. The aim of this study was to identify HAdV types detected in patients hospitalized for severe respiratory illness. The study population consisted of 743 patients with severe respiratory disease admitted to four major hospitals in Kuwait between January 2013 and December 2016. Respiratory specimens were retrospectively screened for 20 respiratory viruses by real-time PCR. The HAdV hexon gene was amplified and directly sequenced, and HAdV types were identified by performing Bayesian phylogenetic analysis...
February 15, 2018: Journal of Medical Virology
https://www.readbyqxmd.com/read/29445280/the-differences-between-patients-with-panic-disorder-and-healthy-controls-in-psychophysiological-stress-profile
#10
Antonia Kotianova, Michal Kotian, Milos Slepecky, Michaela Chupacova, Jan Prasko, Ingrid Tonhajzerova
Background: Alarming somatic symptoms, in particular, cardiovascular symptoms, are the characteristic feature of panic attacks. Increased cardiac mortality and morbidity have been found in these patients. Power spectral analysis of electrocardiogram R-R intervals is known to be a particularly successful tool in the detection of autonomic instabilities in various clinical disorders. Our study aimed to compare patients with panic disorder and healthy controls in heart rate variation (HRV) parameters (very-low-frequency [VLF], low-frequency [LF], and high-frequency [HF] band components of R-R interval) in baseline and during the response to the mental task...
2018: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29444097/the-effects-of-intensified-training-on-resting-metabolic-rate-rmr-body-composition-and-performance-in-trained-cyclists
#11
Amy L Woods, Anthony J Rice, Laura A Garvican-Lewis, Alice M Wallett, Bronwen Lundy, Margot A Rogers, Marijke Welvaert, Shona Halson, Andrew McKune, Kevin G Thompson
BACKGROUND: Recent research has demonstrated decreases in resting metabolic rate (RMR), body composition and performance following a period of intensified training in elite athletes, however the underlying mechanisms of change remain unclear. Therefore, the aim of the present study was to investigate how an intensified training period, designed to elicit overreaching, affects RMR, body composition, and performance in trained endurance athletes, and to elucidate underlying mechanisms. METHOD: Thirteen (n = 13) trained male cyclists completed a six-week training program consisting of a "Baseline" week (100% of regular training load), a "Build" week (~120% of Baseline load), two "Loading" weeks (~140, 150% of Baseline load, respectively) and two "Recovery" weeks (~80% of Baseline load)...
2018: PloS One
https://www.readbyqxmd.com/read/29434458/assessing-heart-rate-variability-as-a-surrogate-measure-of-cardiac-autonomic-function-in-chronic-traumatic-spinal-cord-injury
#12
Rasha El-Kotob, B Catharine Craven, Sunita Mathur, David S Ditor, Paul Oh, Masae Miyatani, Mary C Verrier
Background: Although cardiac autonomic dysfunction is a contributing factor for cardiovascular disease development in individuals with a spinal cord injury (SCI), it remains poorly understood. Heart rate variability (HRV) analysis has the potential to non-invasively assess the cardiac autonomic nervous system. The study objectives are (a) to determine if there are differences in HRV measures across neurological level of impairment (NLI) and American Spinal Cord Injury Association Impairment Scale (AIS) subgroups, and (b) to determine if there is a relationship between HRV frequency measures (low frequency [LF] and high frequency [HF]) at rest...
2018: Topics in Spinal Cord Injury Rehabilitation
https://www.readbyqxmd.com/read/29433969/shift-work-is-associated-with-reduced-heart-rate-variability-among-men-but-not-women
#13
Gerben Hulsegge, Nidhi Gupta, Karin I Proper, Natasja van Lobenstein, Wilhelmina IJzelenberg, David M Hallman, Andreas Holtermann, Allard J van der Beek
BACKGROUND: Imbalance in the autonomic nervous system due to a disrupted circadian rhythm may be a cause of shift work-related cardiovascular diseases. OBJECTIVE: We aimed to determine the association between shift work and cardiac autonomic activity in blue-collar workers. METHODS: The study included 665 blue-collar workers aged 18-68 years in different occupations from two Danish cohort studies. Time and frequency domain parameters of heart rate variability (HRV) were measured during sleep using the Actiheart monitor, and used as markers of cardiac autonomic function...
February 9, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29432445/promising-effects-of-xanthine-oxidase-inhibition-by-allopurinol-on-autonomic-heart-regulation-estimated-by-heart-rate-variability-hrv-analysis-in-rats-exposed-to-hypoxia-and-hyperoxia
#14
Stanisław Zajączkowski, Wiesław Ziółkowski, Piotr Badtke, Miłosz A Zajączkowski, Damian J Flis, Adam Figarski, Maria Smolińska-Bylańska, Tomasz H Wierzba
BACKGROUND: It has long been suggested that reactive oxygen species (ROS) play a role in oxygen sensing via peripheral chemoreceptors, which would imply their involvement in chemoreflex activation and autonomic regulation of heart rate. We hypothesize that antioxidant affect neurogenic cardiovascular regulation through activation of chemoreflex which results in increased control of sympathetic mechanism regulating heart rhythm. Activity of xanthine oxidase (XO), which is among the major endogenous sources of ROS in the rat has been shown to increase during hypoxia promote oxidative stress...
2018: PloS One
https://www.readbyqxmd.com/read/29429029/very-high-frequency-oscillations-of-heart-rate-variability-in-healthy-humans-and-in-patients-with-cardiovascular-autonomic-neuropathy
#15
Mario Estévez-Báez, Calixto Machado, Julio Montes-Brown, Javier Jas-García, Gerry Leisman, Adam Schiavi, Andrés Machado-García, Claudia Carricarte-Naranjo, Eli Carmeli
Literature reports on the very high frequency (VHF) range of 0.4-0.9 Hz in heart rate variability (HRV) are scanty. The VHF presence in cardiac transplant patients and other conditions associated with reduced vagal influence on the heart encouraged us to explore this spectral band in healthy subjects and in patients diagnosed with cardiac autonomic neuropathy (CAN), and to assess the potential clinical value of some VHF indices. The study included 80 healthy controls and 48 patients with spinocerebellar ataxia type 2 (SCA2) with CAN...
February 11, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29428337/relationship-between-diabetes-mellitus-and-heart-rate-variability-in-community-dwelling-elders
#16
Ícaro J S Ribeiro, Rafael Pereira, Paulo F Valença Neto, Ivna V Freire, Cezar A Casotti, Mitermayer Galvão Dos Reis
BACKGROUND AND OBJECTIVE: Diabetes mellitus is one of the most common non-communicable diseases (NCDs) and may influence the autonomic nervous system. This study aims to analyze the autonomic control, through heart rate variability (HRV), from community-dwelling elders with (DM+) and without diabetes mellitus (DM-). MATERIALS AND METHODS: This cross-sectional study, in which 205 elders (≥ 60 years old), from the urban area of Aiquara municipality gave their written consent to participate...
February 3, 2018: Medicina
https://www.readbyqxmd.com/read/29422737/heart-rate-variability-in-children-following-drowning-injury
#17
Madhuradhar Chegondi, Jun Sasaki, Sayed Naqvi, Wei-Chiang Lin, Andre Raszynski, Balagangadhar R Totapally
Heart rate variability (HRV) has been used as prognostic tool in various disorders in pediatric and adult patients. In our study we aimed to evaluate heart rate variability indices and their association with neurological outcome in three children with anoxic brain injury following drowning. Three children included in the study were admitted following drowning and required mechanical ventilation and targeted temperature management. All physiologic data, including electrocardiography (ECG) and EEG were collected for a period of 3-5 days after enrollment...
January 2018: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29422633/long-term-study-of-heart-rate-variability-responses-to-changes-in-the-solar-and-geomagnetic-environment
#18
Abdullah Alabdulgader, Rollin McCraty, Michael Atkinson, York Dobyns, Alfonsas Vainoras, Minvydas Ragulskis, Viktor Stolc
This long-term study examined relationships between solar and magnetic factors and the time course and lags of autonomic nervous system (ANS) responses to changes in solar and geomagnetic activity. Heart rate variability (HRV) was recorded for 72 consecutive hours each week over a five-month period in 16 participants in order to examine ANS responses during normal background environmental periods. HRV measures were correlated with solar and geomagnetic variables using multivariate linear regression analysis with Bonferroni corrections for multiple comparisons after removing circadian influences from both datasets...
February 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29421829/impact-of-depression-and-psychosocial-treatment-on-heart-rate-variability-in-patients-with-type-2-diabetes-mellitus-an-exploratory-analysis-based-on-the-heidis-trial
#19
Verena Zimmermann-Schlegel, Beate Wild, Peter Nawroth, Stefan Kopf, Wolfgang Herzog, Mechthild Hartmann
OBJECTIVES: To explore the impact of depression on heart rate (HR) and heart rate variability (HRV) as a marker of autonomic nervous system (ANS) impairment in depressed and non-depressed patients with advanced type 2 diabetes mellitus (T2DM) and to explore possible effects of an acceptance- and mindfulness-based group intervention (MBSR) on HR and HRV. METHODS: Alongside a prospective clinical trial, we collected demographic, psychosocial and clinical data from 113 chronic T2DM patients in a standardized setting...
February 8, 2018: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/29420125/deep-ecgnet-an-optimal-deep-learning-framework-for-monitoring-mental-stress-using-ultra-short-term-ecg-signals
#20
Bosun Hwang, Jiwoo You, Thomas Vaessen, Inez Myin-Germeys, Cheolsoo Park, Byoung-Tak Zhang
BACKGROUND: Stress recognition using electrocardiogram (ECG) signals requires the intractable long-term heart rate variability (HRV) parameter extraction process. This study proposes a novel deep learning framework to recognize the stressful states, the Deep ECGNet, using ultra short-term raw ECG signals without any feature engineering methods. METHODS: The Deep ECGNet was developed through various experiments and analysis of ECG waveforms. We proposed the optimal recurrent and convolutional neural networks architecture, and also the optimal convolution filter length (related to the P, Q, R, S, and T wave durations of ECG) and pooling length (related to the heart beat period) based on the optimization experiments and analysis on the waveform characteristics of ECG signals...
February 8, 2018: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
keyword
keyword
6941
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"