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heart rate variability and well-being

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/28265728/impact-of-comorbidity-and-prescription-drugs-on-haemorrhage-in-cholecystectomy
#15
J Strömberg, G Sandblom
BACKGROUND: The purpose of the present study was to analyse the impact of patient-related risk factors and medication drugs on haemorrhagic complications following cholecystectomy. METHODS: All cholecystectomies registered in the Swedish population-based Register for Gallstone Surgery and ERCP (GallRiks) were identified. Risk factors for bleeding were assessed by linking data in the GallRiks to the National Patient Register and the Prescribed Drug Register, respectively...
March 6, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28265249/heart-rate-variability-and-cardiac-vagal-tone-in-psychophysiological-research-recommendations-for-experiment-planning-data-analysis-and-data-reporting
#16
REVIEW
Sylvain Laborde, Emma Mosley, Julian F Thayer
Psychophysiological research integrating heart rate variability (HRV) has increased during the last two decades, particularly given the fact that HRV is able to index cardiac vagal tone. Cardiac vagal tone, which represents the contribution of the parasympathetic nervous system to cardiac regulation, is acknowledged to be linked with many phenomena relevant for psychophysiological research, including self-regulation at the cognitive, emotional, social, and health levels. The ease of HRV collection and measurement coupled with the fact it is relatively affordable, non-invasive and pain free makes it widely accessible to many researchers...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28260600/trends-in-population-blood-pressure-and-determinant-factors-for-population-blood-pressure
#17
Ulla Overgaard Andersen
Strategies to reduce the burden of blood pressure attributable diseases require knowledge of secular trend in PBP and its determinants. The issues were investigated in the Copenhagen City Heart Study. The design of CCHS is a repeated measures study. Such designs are uniquely suited to studying changes of an outcome and what risk factors may be associated with that outcome. Repeated measures studies are very well suited for trend analysis by using mixed effect analyses. SBP decreased about 2 mmHg in 25 years...
March 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28257441/a-novel-approach-for-evaluating-the-effects-of-odor-stimulation-on-dynamic-cardiorespiratory-functions
#18
Eriko Kawai, Hidehiro Nakahara, Shin-Ya Ueda, Kou Manabe, Tadayoshi Miyamoto
We aimed to develop a novel method to quantitatively evaluate the effects of odor stimulation on cardiorespiratory functions over time, and to examine the potential usefulness of clinical aromatherapy. Eighteen subjects participated. Nine people were assigned to each of the two resting protocols. Protocol 1: After resting for 2 min in a sitting position breathing room air, the subject inhaled either air or air containing sweet marjoram essential oil from the Douglas bag for 6 min, Protocol 2: After resting for 5 min in a supine position, the subject inhaled the essential oil for 10 min, and then recovered for 10 min breathing room air...
2017: PloS One
https://www.readbyqxmd.com/read/28249595/non-contact-synchronous-dynamic-measurement-of-respiratory-rate-and-heart-rate-based-on-dual-sensitive-regions
#19
Bing Wei, Xuan He, Chao Zhang, Xiaopei Wu
BACKGROUND: Currently, many imaging photoplethysmography (IPPG) researches have reported non-contact measurements of physiological parameters, such as heart rate (HR), respiratory rate (RR), etc. However, it is accepted that only HR measurement has been mature for applications, and other estimations are relatively incapable for reliable applications. Thus, it is worth keeping on persistent studies. Besides, there are some issues commonly involved in these approaches need to be explored further...
January 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28249028/heart-rate-variability-during-hemodialysis-is-an-indicator-for-long-term-vascular-access-survival-in-uremic-patients
#20
Ya-Ting Huang, Yu-Ming Chang, I-Ling Chen, Chuan-Lan Yang, Show-Chin Leu, Hung-Li Su, Jsun-Liang Kao, Shih-Ching Tsai, Rong-Na Jhen, Woung-Ru Tang, Chih-Chung Shiao
BACKGROUND: Vascular access (VA) is the lifeline of hemodialysis patients. Although the autonomic nervous system might be associated with VA failure (VAF), it has never been addressed in previous studies. This study aimed to evaluate the predictive values of the heart rate variability (HRV) indices for long-term VA outcomes. METHODS: This retrospective study was conducted using a prospectively established cohort enrolling 175 adult chronic hemodialysis patients (100 women, mean age 65...
2017: PloS One
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