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heart rate variability and well-being

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https://www.readbyqxmd.com/read/28432612/evaluation-of-the-analgesia-nociception-index-ani-in-healthy-awake-volunteers
#1
Rami Issa, Marco Julien, Elizabeth Décary, Olivier Verdonck, Louis-Philippe Fortier, Pierre Drolet, Philippe Richebé
BACKGROUND: Analgesia might be evaluated with simple changes in vital signs, a non-specific and non-sensitive method. Heart rate variability (HRV) correlates with autonomous nervous system activity and can be used to evaluate painful stimuli. Heart rate variability is then transformed into a numeric scale called the analgesia nociception index (ANI), where higher values represent predominant parasympathetic tone, thus low nociception. Under general anesthesia, the ANI decreases following painful stimuli and increases after administration of analgesia, but significant interindividual variability is present...
April 21, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28412613/intensified-emotion-perception-in-depression-differences-in-physiological-arousal-and-subjective-perceptions
#2
Sofia Wenzler, Marleen Hagen, Mika P Tarvainen, Marietheres Hilke, Naddy Ghirmai, Ann-Caitlin Huthmacher, Marco Trettin, Rolf van Dick, Andreas Reif, Viola Oertel-Knöchel
People suffering from depression perceive themselves and their surroundings as more negative than healthy ones. An explanation might be that depressed individuals experience negative information as more stressful than non-depressed subjects and, consequently, respond in an amplified manner on a subjective and physiological level. To test this proposition, we presented 41 patients with recurrent depressive episodes and 42 controls with stimuli from the International Affective Picture System split into three valence categories while different parameters of physiological arousal (e...
April 2, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28383791/breath-hold-and-free-breathing-2d-phase-contrast-mri-for-quantification-of-oxygen-induced-changes-of-pulmonary-circulation-dynamics-in-healthy-volunteers
#3
Christoph P Czerner, Hinrich B Winther, Antonia Zapf, Frank Wacker, Jens Vogel-Claussen
PURPOSE: To evaluate the effect of inhaled 100% oxygen on pulmonary circulation dynamics in healthy volunteers using 2D phase-contrast magnetic resonance imaging (2D PC MRI). MATERIALS AND METHODS: Twenty-one healthy volunteers were examined at 1.5T. Through-plane 2D PC MRI measurements were performed in the main pulmonary artery during free-breathing and breath-hold. Acceleration time and volume, maximum and minimum area, area change, average and maximum mean velocity, forward volume, heart rate, as well as blood pressure were determined...
April 6, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28376910/the-preschool-activity-technology-health-adiposity-behaviour-and-cognition-path-abc-cohort-study-rationale-and-design
#4
Dylan P Cliff, Jade McNeill, Stewart Vella, Steven J Howard, Megan A Kelly, Douglas J Angus, Ian M Wright, Rute Santos, Marijka Batterham, Edward Melhuish, Anthony D Okely, Marc de Rosnay
BACKGROUND: Prevalence estimates internationally suggest that many preschool-aged children (3-5 years) are insufficiently physically active and engage in high levels of screen-based entertainment. Early childhood is the developmental period for which we know the least about the effects of physical activity on development and health. Likewise, rapid technological advancements in mobile electronic media have made screen-based forms of entertainment for young children ubiquitous, and research demonstrating the impacts on cognition, psychosocial well-being, and health has lagged behind the rate of adoption of these technologies...
April 4, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28375664/effects-of-short-term-acclimatization-at-the-summit-of-mt-fuji-3776%C3%A2-m-on-sleep-efficacy-cardiovascular-responses-and-ventilatory-responses
#5
Masahiro Horiuchi, Shiro Oda, Tadashi Uno, Junko Endo, Yoko Handa, Yoshiyuki Fukuoka
Horiuchi, Masahiro, Shiro Oda, Tadashi Uno, Junko Endo, Yoko Handa, and Yoshiyuki Fukuoka. Effects of short-term acclimatization at the summit of Mt. Fuji (3776 m) on sleep efficacy, cardiovascular responses, and ventilatory responses. High Alt Med Biol 00:000-000, 2017.-We investigated the effects of a short period of acclimatization, at 3776 m on Mt. Fuji, on sleep parameters and related physiological responses. Physiological responses were assessed in seven healthy lowlander men during both daytime and sleep while at sea level (SL), as well as for three consecutive nights at high altitude (HA; 3776 m, day 1 [D1], D2, D3, and morning only of D4)...
April 4, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28350577/reliability-of-heart-rate-as-neuroadrenergic-marker-in-the-metabolic-syndrome
#6
Fosca Quarti Trevano, Gino Seravalle, Mario Macchiarulo, Paolo Villa, Carlo Valena, Raffaella Dell'Oro, Giuseppe Mancia, Guido Grassi
BACKGROUND: Metabolic syndrome is characterized by a pronounced sympathetic overactivity as documented by the marked increase in muscle sympathetic nerve traffic (MSNA) as well as in plasma norepinephrine values reported in this condition. Whether and to what extent heart rate (HR) reflects the abovementioned adrenergic alterations in metabolic syndrome remains largely undefined. It is also undefined the validity of the abovementioned adrenergic markers in reflecting the main features of the metabolic syndrome...
March 27, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28340040/impaired-ability-to-grow-colonies-of-endothelial-stem-cells-could-be-the-mechanism-explaining-the-high-cardiovascular-morbidity-mortality-of-patients-with-depression
#7
Blum Arnon, Pastukh Nina, Zaroura Imad, Jonathan Rotem, Farhat Kamal
Background: Subjects with depression are more prone to develop cardiovascular complications. Severity of depression is associated with higher rates of cardiovascular mortality and morbidity. Several mechanisms were suggested including accelerated atherosclerosis, alteration of the cardiac autonomic response with a decrease in heart rate variability. There is evidence that circulating endothelial progenitor cells (EPCs) are decreased in patients with major depression. Our hypothesis was that patients with depression would have an impaired ability to build colonies of endothelial progenitor cells...
March 9, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/28338768/integrative-blood-pressure-response-to-upright-tilt-post-renal-denervation
#8
Erin J Howden, Cara East, Justin S Lawley, Abigail S L Stickford, Myrthe Verhees, Qi Fu, Benjamin D Levine
BACKGROUND: Whether renal denervation (RDN) in patients with resistant hypertension normalizes blood pressure (BP) regulation in response to routine cardiovascular stimuli such as upright posture is unknown. We conducted an integrative study of BP regulation in patients with resistant hypertension who had received RDN to characterize autonomic circulatory control. METHODS: Twelve patients (60 ± 9 [SD] years, n = 10 males) who participated in the Symplicity HTN-3 trial were studied and compared to 2 age-matched normotensive (Norm) and hypertensive (unmedicated, HTN) control groups...
February 20, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28337432/the-current-and-future-role-of-heart-rate-variability-for-assessing-and-training-compassion
#9
James N Kirby, James R Doty, Nicola Petrocchi, Paul Gilbert
The evolution of mammalian caregiving involving hormones, such as oxytocin, vasopressin, and the myelinated vagal nerve as part of the ventral parasympathetic system, enables humans to connect, co-regulate each other's emotions and create prosociality. Compassion-based interventions draw upon a number of specific exercises and strategies to stimulate these physiological processes and create conditions of "interpersonal safeness," thereby helping people engage with, alleviate, and prevent suffering. Hence, compassion-based approaches are connected with our evolved caring motivation and attachment and our general affiliative systems that help regulate distress...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28292582/-profile-and-evolution-of-chronic-complex-patients-in-a-subacute-unit
#10
Neus Gual, Anna Yuste Font, Belen Enfedaque Montes, Carles Blay Pueyo, Remedios Martín Álvarez, Marco Inzitari
OBJECTIVE: To improve the management of geriatric pluripathologic patients in Catalonia, the identification of chronic complex patient (PCC) or patients with advanced chronic disease (MACA) has been promoted. Patients with exacerbated chronic diseases are promoted to be admitted in subacute units (SG) located in intermediate hospitals and specialized in geriatric care, as an alternative to acute hospital. The results of the care process in patients identified as PCC/MACA in SG have not been evaluated...
March 11, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28283237/duodenal-ulcers-are-a-major-cause-of-gastrointestinal-bleeding-after-cardiac-surgery
#11
Frances Krawiec, Andrew Maitland, Qiuli Duan, Peter Faris, Paul J Belletrutti, William D T Kent
OBJECTIVE: To determine the incidence of gastrointestinal (GI) bleeding in patients after cardiac surgery, assess the perioperative risk factors, and determine the type of GI tract pathology associated with bleeding events. METHODS: At a tertiary referral hospital, all cardiac surgery patients having a postoperative GI bleed from April 2002 to March 2012 were identified. To determine bleeding etiology, only patients requiring endoscopy were included in the analysis...
February 14, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28275316/cohort-description-the-danish-study-of-functional-disorders
#12
Thomas Meinertz Dantoft, Jeanette Frost Ebstrup, Allan Linneberg, Sine Skovbjerg, Anja Lykke Madsen, Jesper Mehlsen, Louise Brinth, Lene Falgaard Eplov, Tina Wisbech Carstensen, Andreas Schroder, Per Klausen Fink, Erik Lykke Mortensen, Torben Hansen, Oluf Pedersen, Torben Jørgensen
The Danish study of Functional Disorders (DanFunD) cohort was initiated to outline the epidemiology of functional somatic syndromes (FSS) and is the first larger coordinated epidemiological study focusing exclusively on FSS. FSS are prevalent in all medical settings and can be defined as syndromes that, after appropriate medical assessment, cannot be explained in terms of a conventional medical or surgical disease. FSS are frequent and the clinical importance varies from vague symptoms to extreme disability...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28270884/critical-imperative-for-the-reform-of-british-interpretation-of-fetal-heart-rate-decelerations-analysis-of-figo-and-nice-guidelines-post-truth-foundations-cognitive-fallacies-myths-and-occam-s-razor
#13
REVIEW
Shashikant L Sholapurkar
Cardiotocography (CTG) has disappointingly failed to show good predictability for fetal acidemia or neonatal outcomes in several large studies. A complete rethink of CTG interpretation will not be out of place. Fetal heart rate (FHR) decelerations are the most common deviations, benign as well as manifestation of impending fetal hypoxemia/acidemia, much more commonly than FHR baseline or variability. Their specific nomenclature is important (center-stage) because it provides the basic concepts and framework on which the complex "pattern recognition" of CTG interpretation by clinicians depends...
April 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28270769/the-role-of-power-fluctuations-in-the-preference-of-diagonal-vs-double-poling-sub-technique-at-different-incline-speed-combinations-in-elite-cross-country-skiers
#14
Christine Dahl, Øyvind Sandbakk, Jørgen Danielsen, Gertjan Ettema
In classical cross-country skiing, diagonal stride (DIA) is the major uphill sub-technique, while double poling (DP) is used on relatively flat terrain. Although, the dependence of incline and speed on the preference of either sub-technique seems clearly established, the mechanisms behind these preferences are not clear. Therefore, the purpose of this study was to compare kinetics and energy consumption in DP and DIA at the same submaximal workload in cross-country skiing under two different incline-speed combinations...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28270645/kidney-function-in-patients-with-different-variants-of-beta-thalassemia
#15
Azar Nickavar, Azadeh Qmarsi, Shahla Ansari, Elham Zarei
INTRODUCTION: Renal involvement is a rare complication of β-thalassemia. Both tubular and glomerular dysfunction might occur in these patients. The aim of this study was to evaluate and compare kidney function in the major, intermedia, and minor variants of β-thalassemia. MATERIALS AND METHODS: Renal tubular and glomerular function of 72 patients with β-thalassemia (25 major, 23 intermedia, and 24 minor) were evaluated. Patients older than 40 years and those with chronic kidney disease, diabetes mellitus, congestive heart failure, associated infections, congenital anomalies of the kidney and urinary tract were excluded...
March 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/28269675/effect-of-embedding-dimension-on-complexity-measures-in-identifying-arrhythmia
#16
Radhagayathri K Udhayakumar, Chandan Karmakar, Peng Li, Marimuthu Palaniswami
Entropy measures like Approximate entropy (ApEn) and Sample entropy (SampEn) are well established tools to analyze Heart Rate Variability (HRV) data. Critical parameters involved in these computations namely embedding dimension m and tolerance r are in most cases assumed to be 2 and 0.2*signal SD (standard devaition) respectively. Such assumptions do not work fairly across data sets and thus create misleading results in many cases. Problems with r have been addressed with the advent of newer entropy measures like Permutation entropy (PE), Fuzzy entropy (FuzzyEn) and Distribution entropy (DistEn) that simply eliminate, modify or replace r from calculations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269672/long-range-correlations-in-amplitude-variability-of-hf-and-lf-components-of-heart-rate-variability
#17
Yuki Miki, Yasuyuki Suzuki, Eiichi Watanabe, Junichiro Hayano, Yoshiharu Yamamoto, Taishin Nomura, Ken Kiyono
For the assessment of autonomic nervous system activity based on heart rate variability (HRV) analysis, characteristics of high-frequency (HF; 0.15 to 0.4 Hz) and low-frequency (LF; 0.04 to 0.15 Hz) components have been widely employed. HF and LF band powers quantified by power spectral analysis have most commonly been used in the conventional studies; the physiological significance of these measures has also been extensively studied. However, nonlinear characteristics of HF and LF components have not been well established...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269362/non-invasive-heart-rate-monitoring-system-using-giant-magneto-resistance-sensor
#18
Kubera Kalyan, Vinit Kumar Chugh, C S Anoop
A simple heart rate (HR) monitoring system designed and developed using the Giant Magneto-Resistance (GMR) sensor is presented in this paper. The GMR sensor is placed on the wrist of the human and it provides the magneto-plethysmographic signal. This signal is processed by the simple analog and digital instrumentation stages to render the heart rate indication. A prototype of the system has been built and test results on 26 volunteers have been reported. The error in HR estimation of the system is merely 1 beat per minute...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268805/missing-rri-interpolation-for-hrv-analysis-using-locally-weighted-partial-least-squares-regression
#19
Keisuke Kamata, Koichi Fujiwara, Toshiki Yamakawa, Manabu Kano
The R-R interval (RRI) fluctuation in electrocardiogram (ECG) is called heart rate variability (HRV). Since HRV reflects autonomic nervous function, HRV-based health monitoring services, such as stress estimation, drowsy driving detection, and epileptic seizure prediction, have been proposed. In these HRV-based health monitoring services, precise R wave detection from ECG is required; however, R waves cannot always be detected due to ECG artifacts. Missing RRI data should be interpolated appropriately for HRV analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268478/comparison-of-pulse-rate-variability-and-heart-rate-variability-for-high-frequency-content-estimation
#20
R Logier, J De Jonckheere, A Dassonneville, M Jeanne
Heart Rate Variability (HRV) analysis can be of precious help in most of clinical situations because it is able to quantify the Autonomic Nervous System (ANS) activity. The HRV high frequency (HF) content, related to the parasympathetic tone, reflects the ANS response to an external stimulus responsible of pain, stress or various emotions. We have previously developed the Analgesia Nociception Index (ANI), based on HRV high frequency content estimation, which quantifies continuously the vagal tone in order to guide analgesic drug administration during general anesthesia...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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