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"Heart rate variability"

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https://www.readbyqxmd.com/read/29777559/utility-of-heart-rate-turbulence-and-t-wave-alternans-to-assess-risk-for-re-admission-and-cardiac-death-in-hospitalized-heart-failure-patients
#1
Shinya Yamada, Akiomi Yoshihisa, Yu Sato, Takamasa Sato, Masashi Kamioka, Takashi Kaneshiro, Masayoshi Oikawa, Atsushi Kobayashi, Hitoshi Suzuki, Takafumi Ishida, Yasuchika Takeishi
BACKGROUND: Heart failure (HF) patients have a higher risk of recurrent HF and cardiac death, and electrical remodeling is considered to be an important factor for HF progression. The present study aimed to validate the utility of electrocardiogram and Holter monitoring for the risk stratification of HF patients. METHODS: Our study comprised 215 patients (144 males, mean age 62 years) who had been hospitalized due to acute decompensated HF. Electrocardiogram (QRS duration and QTc interval) and 24-hour Holter monitoring (heart rate variability, heart rate turbulence and T-wave alternans [TWA]) were performed in stable condition before discharge...
May 18, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29775234/effects-of-whole-body-vibration-on-heart-rate-variability-acute-responses-and-training-adaptations
#2
REVIEW
Alexei Wong, Arturo Figueroa
Heart rate variability (HRV) is a noninvasive and practical measure of cardiac autonomic nervous system function, mainly the sympathetic and parasympathetic modulations of heart rate. A low HRV has been shown to be indicative of compromised cardiovascular health. Interventions that enhance HRV are therefore beneficial to cardiovascular health. Whole-body vibration (WBV) training has been proposed as an alternative time-efficient exercise intervention for the improvement of cardiovascular health. In this review, we discuss the effect of WBV both acute and after training on HRV...
May 18, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29774517/the-acute-effects-of-age-and-particulate-matter-exposure-on-heart-rate-and-heart-rate-variability-in-mice
#3
Blake A Bennett, Ernst W Spannhake, Ana M Rule, Patrick N Breysse, Clarke G Tankersley
Exposure to ambient particulate matter (PM) is associated with increased cardiac morbidity and mortality with the elderly considered to be the most susceptible. The purpose of this study was to determine if exposure to PM would cause a greater impact on heart regulation in older DBA/2 (D2) male mice as determined by changes in heart rate (HR) and heart rate variability (HRV). D2 mice at the ages of 4, 12, and 19 months were instilled with 100 µg of PM or saline by aspiration. Before and after the aspiration, 3-min echocardiogram (ECG) samples for HR and HRV were recorded at 15-min intervals for 3 h along with corresponding measurements of homeostasis, such as temperature, metabolism, and ventilation...
May 17, 2018: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/29771730/vagal-mediation-of-low-frequency-heart-rate-variability-during-slow-yogic-breathing
#4
Bryan W Kromenacker, Anna A Sanova, Frank I Marcus, John J B Allen, Richard D Lane
OBJECTIVE: Changes in heart rate variability (HRV) associated with breathing (respiratory sinus arrhythmia [RSA]) are known to be parasympathetically (vagally) mediated when the breathing rate is within the typical frequency range (9-24 breaths/min; high frequency HRV). Slow yogic breathing occurs at rates below this range and increases low frequency HRV power, which may additionally reflect a significant sympathetic component. Yogic breathing techniques are hypothesized to confer health benefits by increasing cardiac vagal control, but increases in low frequency HRV power cannot unambiguously distinguish sympathetic from parasympathetic contributions...
May 16, 2018: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29771557/distress-tolerance-associations-with-trauma-and-substance-cue-reactivity-in-low-income-inner-city-adults-with-substance-use-disorders-and-posttraumatic-stress
#5
Anka A Vujanovic, Margaret C Wardle, Jafar Bakhshaie, Lia J Smith, Charles E Green, Scott D Lane, Joy M Schmitz
Cue reactivity has great potential to advance our understanding of posttraumatic stress disorder (PTSD), substance use disorder (SUD), and PTSD/SUD comorbidity. The present investigation examined distress tolerance (DT) with regard to trauma and substance cue reactivity. Participants included 58 low-income, inner-city adults (49.1% women; Mage = 45.73, SD = 10.00) with substance dependence and at least 4 symptoms of PTSD. A script-driven cue reactivity paradigm was utilized. Four DT measures were administered, including the Distress Tolerance Scale (DTS), Mirror-Tracing Persistence Task (MTPT), Breath-Holding Task (BH), and Paced Auditory Serial Addition Task (PASAT)...
May 2018: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/29768021/diminished-heart-rate-complexity-in-adolescent-girls-a-sign-of-vulnerability-to-anxiety-disorders
#6
Aina Fiol-Veny, Alejandro De la Torre-Luque, Maria Balle, Xavier Bornas
BACKGROUND AND OBJECTIVES: Diminished heart rate variability has been found to be associated with high anxiety symptomatology. Since adolescence is the period of onset for many anxiety disorders, this study aimed to determine sex- and anxiety-related differences in heart rate variability and complexity in adolescents. METHODS: We created four groups according to sex and anxiety symptomatology: high-anxiety girls (n = 24) and boys (n = 25), and low-anxiety girls (n = 22) and boys (n = 24) and recorded their cardiac function while they performed regular school activities...
May 15, 2018: Anxiety, Stress, and Coping
https://www.readbyqxmd.com/read/29767628/heart-rate-differences-between-symptomatic-and-asymptomatic-brugada-syndrome-patients-at-night
#7
Mireia Calvo, Virginie Le Rolle, Daniel Romero, Nathalie Behar, Pedro Gomis, Philippe Mabo, Alfredo Hernandez
Ventricular arrhythmias in Brugada syndrome (BS) mainly occur at rest, especially during nighttime, suggesting that parasympathetic activity at night may play an important role in the arrhythmogenesis of the disease. This study examined and compared the autonomic function of symptomatic and asymptomatic BS patients overnight.
 Approach: We analyzed different heart rate variability (HRV) and heart rate complexity (HRC) markers in a clinical series including 87 BS patients, where 23 were symptomatic.
 Main results: Statistically significant differences were found in MIRR, SDNN, SDANN, δSDANN and SampEn, suggesting that symptomatic patients may be related to lower heart rate variability and complexity values, as well as to greater circadian fluctuations overnight...
May 16, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29766226/cutoffs-of-short-term-heart-rate-variability-parameters-in-brazilian-adolescents-male
#8
Breno Quintella Farah, Diego Giulliano Destro Christofaro, Bruno Remígio Cavalcante, Aluísio Andrade-Lima, Antonio Henrique Germano-Soares, Luiz Carlos Marques Vanderlei, Fernanda Cordoba Lanza, Raphael Mendes Ritti-Dias
A low heart rate variability (HRV) has been associated with cardiovascular risk factors in adolescents. However, no cut-off points are known for HRV parameters in this age group, making it difficult to use in clinical practice. Thus, the aims of the current study were to establish cutoffs of HRV parameters and to examine their association with cardiovascular risk in Brazilian adolescents male. For this reason, this cross-sectional study included 1152 adolescent boys (16.6 ± 1.2 years old). HRV measures of time (SD of all RR intervals, root mean square of the squared differences between adjacent normal RR intervals, and the percentage of adjacent intervals over 50 ms), frequency domains [low (LF) and high (HF) frequency], and Poincaré plot (SD1, SD2 and SD1/SD2 ratio) were assessed...
May 15, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29765335/heart-rate-variability-during-a-joint-attention-task-in-toddlers-with-autism-spectrum-disorders
#9
Lucia Billeci, Alessandro Tonacci, Antonio Narzisi, Zaira Manigrasso, Maurizio Varanini, Francesca Fulceri, Caterina Lattarulo, Sara Calderoni, Filippo Muratori
Background: Autism Spectrum Disorders (ASD) are a heterogeneous group of neurodevelopmental disorders featuring early impairments in social domain, with autonomic nervous system (ANS) unbalance possibly representing a useful marker for such disturbances. Impairments in joint attention (JA) are one of the earliest markers of social deficits in ASD. In this study, we assessed the feasibility of using wearable technologies for characterizing the ANS response in ASD toddlers during the presentation of JA stimuli...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29764606/sex-and-family-history-of-cardiovascular-disease-influence-heart-rate-variability-during-stress-among-healthy-adults
#10
Charles F Emery, Catherine M Stoney, Julian F Thayer, DeWayne Williams, Andrew Bodine
OBJECTIVE: Studies of sex differences in heart rate variability (HRV) typically have not accounted for the influence of family history (FH) of cardiovascular disease (CVD). This study evaluated sex differences in HRV response to speech stress among men and women (age range 30-49 years) with and without a documented FH of CVD. METHODS: Participants were 77 adults (mean age = 39.8 ± 6.2 years; range: 30-49 years; 52% female) with positive FH (FH+, n = 32) and negative FH (FH-, n = 45) of CVD, verified with relatives of participants...
July 2018: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/29763849/heart-rate-variability-as-candidate-endophenotype-of-social-anxiety-a-two-generation-family-study
#11
A Harrewijn, M J W Van der Molen, B Verkuil, S W Sweijen, J J Houwing-Duistermaat, P M Westenberg
BACKGROUND: Social anxiety disorder (SAD) is the extreme fear and avoidance of one or more social situations. The goal of the current study was to investigate whether heart rate variability (HRV) during resting state and a social performance task (SPT) is a candidate endophenotype of SAD. METHODS: In this two-generation family study, patients with SAD with their partner and children, and their siblings with partner and children took part in a SPT (total n = 121, 9 families, 3-30 persons per family, age range: 8-61 years, 17 patients with SAD)...
May 8, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29763454/multivariate-classification-of-brugada-syndrome-patients-based-on-autonomic-response-to-exercise-testing
#12
Mireia Calvo, Daniel Romero, Virginie Le Rolle, Nathalie Béhar, Pedro Gomis, Philippe Mabo, Alfredo I Hernández
Ventricular arrhythmias in Brugada syndrome (BS) typically occur at rest and especially during sleep, suggesting that changes in the autonomic modulation may play an important role in arrhythmogenesis. The autonomic response to exercise and subsequent recovery was evaluated on 105 patients diagnosed with BS (twenty-four were symptomatic), by means of a time-frequency heart rate variability (HRV) analysis, so as to propose a novel predictive model capable of distinguishing symptomatic and asymptomatic BS populations...
2018: PloS One
https://www.readbyqxmd.com/read/29761087/heart-rate-variability-and-pulse-pressure-amplification-lessons-from-diabetic-patients
#13
Agne Laucyte-Cibulskiene
No abstract text is available yet for this article.
March 2018: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/29761083/lower-heart-rate-variability-is-associated-with-lower-pulse-pressure-amplification-role-of-obesity
#14
Nicola Di Daniele, Manfredi Tesauro, Alberto Mascali, Valentina Rovella, Angelo Scuteri
Background: Heart rate variability (HRV), pulse pressure amplification, and obesity represent risk factors for cardiovascular events. The aims of the present study are (1) to explore the impact of HRV on pulse pressure amplification and (2) to investigate whether the association between HRV and pulse pressure amplification differs in obese and lean subjects. Methods: A total of 342 patients (age 61 ± 11 years) were enrolled. HRV was analyzed concerning both the frequency and time domain as well as concerning the HRV triangular index...
March 2018: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/29758470/association-between-changes-in-heart-rate-variability-during-the-anticipation-of-a-stressful-situation-and-the-stress-induced-cortisol-response
#15
Matias M Pulopulos, Marie-Anne Vanderhasselt, Rudi De Raedt
Vagal activity - reflecting the activation of stress regulatory mechanisms and prefrontal cortex activation - is thought to play an inhibitory role in the regulation of the hypothalamus-pituitary-adrenal axis. However, most studies investigating the association between stress-induced changes in heart rate variability (HRV, an index of cardiac vagal tone) and cortisol have shown a non-significant relationship. It has been proposed that physiological changes observed during anticipation of a stressor allow individuals to make behavioral, cognitive, and physiological adjustments that are necessary to deal with the upcoming actual stressor...
May 3, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29756411/hexarelin-treatment-preserves-myocardial-function-and-reduces-cardiac-fibrosis-in-a-mouse-model-of-acute-myocardial-infarction
#16
Hayley McDonald, Jason Peart, Nyoman Kurniawan, Graham Galloway, Simon Royce, Chrishan S Samuel, Chen Chen
Ischemic heart disease (IHD) is a leading cause of morbidity and mortality worldwide. Growth hormone secretagogues (GHS) have been shown to improve cardiac function in models of IHD. This study determined whether hexarelin (HEX), a synthetic GHS, preserves cardiac function and morphology in a mouse model of myocardial infarction (MI). MI was induced by ligation of the left descending coronary artery in C57BL/6J mice followed by vehicle (VEH; n = 10) or HEX (0.3 mg/kg/day; n = 11) administration for 21 days...
May 2018: Physiological Reports
https://www.readbyqxmd.com/read/29756192/heart-rate-variability-during-and-after-chemotherapy-with-anthracycline-in-patients-with-breast-cancer
#17
Paweł Stachowiak, Marta Milchert-Leszczyńska, Michał Falco, Andrzej Wojtarowicz, Robert Kaliszczak, Krzysztof Safranow, Zdzisława Kornacewicz-Jach
No abstract text is available yet for this article.
2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29755366/normal-values-of-corrected-heart-rate-variability-in-10-second-electrocardiograms-for-all-ages
#18
Marten E van den Berg, Peter R Rijnbeek, Maartje N Niemeijer, Albert Hofman, Gerard van Herpen, Michiel L Bots, Hans Hillege, Cees A Swenne, Mark Eijgelsheim, Bruno H Stricker, Jan A Kors
Purpose: Heart-rate variability (HRV) measured on standard 10-s electrocardiograms (ECGs) has been associated with increased risk of cardiac and all-cause mortality, but age- and sex-dependent normal values have not been established. Since heart rate strongly affects HRV, its effect should be taken into account. We determined a comprehensive set of normal values of heart-rate corrected HRV derived from 10-s ECGs for both children and adults, covering both sexes. Methods: Five population studies in the Netherlands (Pediatric Normal ECG Study, Leiden University Einthoven Science Project, Prevention of Renal and Vascular End-stage Disease Study, Utrecht Health Project, Rotterdam Study) provided 10-s, 12-lead ECGs...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29754420/the-predictive-value-of-the-heart-rate-variability-derived-analgesia-nociception-index-in-children-anaesthetised-with-sevoflurane-an-observational-pilot-study
#19
Frank Weber, Noortje J E Geerts, Hilde G Roeleveld, Annejet T Warmenhoven, Chantal A Liebrand
BACKGROUND: The heart rate variability (HRV) derived Analgesia Nociception Index (ANI™ ) is a continuous non-invasive tool to assess the nociception/anti-nociception balance in unconscious patients. It has been shown to be superior to hemodynamic variables in detecting insufficient anti-nociception in children, while little is known about its predictive value. METHODS: The primary objective of this prospective observational pilot study in paediatric surgical patients under sevoflurane anaesthesia, was to compare the predictive value of the ANI and heart rate to help decide to give additional opioids...
May 13, 2018: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29753421/nonlinear-analyses-of-heart-rate-variability-in-hypertension
#20
B K Koichubekov, M A Sorokina, Y M Laryushina, L G Turgunova, I V Korshukov
OBJECTIVE: The autonomic nervous system plays an important role in blood pressure regulation and in the development of hypertension. Heart rate variability (HRV) may be of importance in identifying subjects at higher risk of developing hypertension. In the present study, comparative analysis of HRV for normal and hypertension subjects using nonlinear indices has been carried out. PATIENTS AND METHODS: We analyzed the data from 24 patients with essential hypertension aged 45-55 (HG)...
May 9, 2018: Annales de Cardiologie et D'angéiologie
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