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https://www.readbyqxmd.com/read/29217881/reduced-baroreflex-sensitivity-decreased-heart-rate-variability-with-increased-arterial-stiffness-in-predialysis
#1
C Lal, M Kaur, A K Jaryal, K K Deepak, D Bhowmik, S K Agarwal
High cardiovascular morbidity and mortality is observed in predialytic chronic kidney disease (CKD) patients. The underlying mechanism of cardiovascular dysfunction often remains unclear. The present study was designed to perform multiparametric assessment of baroreflex sensitivity (BRS), arterial stiffness indices, and cardiovascular variabilities (heart rate variability [HRV] and blood pressure variability [BPV]) together in predialytic CKD patients; compare it with normal healthy controls; and determine their relationships in predialytic nondiabetic CKD patients...
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29214150/the-physiocam-a-novel-non-contact-sensor-to-measure-heart-rate-variability-in-clinical-and-field-applications
#2
Maria I Davila, Gregory F Lewis, Stephen W Porges
Heart rate variability (HRV) is a reliable indicator of health status and a sensitive index of autonomic stress reactivity. Stress negatively affects physical and psychological wellness by decreasing cardiovascular health and reducing quality of life. Wearable sensors have made it possible to track HRV during daily activity, and recent advances in mobile technology have reduced the cost and difficulty of applying this powerful technique. Although advances have made sensors smaller and lighter, some burden on the subject remains...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29214015/effect-of-spinal-manipulative-treatment-on-cardiovascular-autonomic-control-in-patients-with-acute-low-back-pain
#3
Mohamed Younes, Karine Nowakowski, Benoit Didier-Laurent, Michel Gombert, François Cottin
Background: This study aimed to quantify the effect of spinal manipulative treatment (SMT) from an analysis of baroreflex, systolic blood pressure and heart rate variability (HRV) on patients with acute back pain. It was hypothesized that SMT would increase the parasympathetic cardiovascular autonomic control. Methods: Twenty-two patients with acute back pain were randomly divided into two groups: one receiving sham treatment (Sham) and the other receiving SMT. Recordings were completed during the first day and the seventh day, immediately before and after treatment on both days...
2017: Chiropractic & Manual Therapies
https://www.readbyqxmd.com/read/29211795/increase-in-salivary-oxytocin-and-decrease-in-salivary-cortisol-after-listening-to-relaxing-slow-tempo-and-exciting-fast-tempo-music
#4
Yuuki Ooishi, Hideo Mukai, Ken Watanabe, Suguru Kawato, Makio Kashino
Relaxation and excitation are components of the effects of music listening. The tempo of music is often considered a critical factor when determining these effects: listening to slow-tempo and fast-tempo music elicits relaxation and excitation, respectively. However, the chemical bases that underlie these relaxation and excitation effects remain unclear. Since parasympathetic and sympathetic nerve activities are facilitated by oxytocin and glucocorticoid, respectively, we hypothesized that listening to relaxing slow-tempo and exciting fast-tempo music is accompanied by increases in the oxytocin and cortisol levels, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/29210841/comparison-of-heart-rate-variability-parameters-to-the-autonomic-reflex-screen-in-postural-orthostatic-tachycardia-syndrome-and-neurogenic-orthostatic-hypotension
#5
Jacquie Baker, Juan M Racosta, Kurt Kimpinski
PURPOSE: The clinical significance of heart rate variability (HRV) in the context of autonomic dysfunction continues to be a matter of debate. Therefore, the purpose of the current study was to investigate the clinical relevance of HRV in the context of autonomic dysfunction. METHODS: Heart rate variability data from 225 volunteers consisting of controls (n = 166) and patients with mild (n = 25) and severe (n = 34) autonomic dysfunction were retrospectively analyzed...
November 23, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29192184/affective-emotion-increases-heart-rate-variability-and-activates-left-dorsolateral-prefrontal-cortex-in-post-traumatic-growth
#6
Chuguang Wei, Jin Han, Yuqing Zhang, Walter Hannak, Yanyan Dai, Zhengkui Liu
The present study evaluated the activities of heart rate variability (HRV) and dorsolateral prefrontal cortex (DLPFC) in response to the presentation of affective pictures correlated with posttraumatic growth (PTG) among adults exposed to the Tianjin explosion incident. The participants who were directly involved in the Tianjin explosions were divided into control, post-traumatic stress disorder (PTSD) and PTG group according to the scores of PTSD Checklist-Civilian Version and PTG Inventory survey. All participants received exposure to affective images...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29190808/the-validity-of-linear-and-non-linear-heart-rate-metrics-as-workload-indicators-of-emergency-physicians
#7
Frederick Schneider, Jan Martin, Alexander Hapfelmeier, Denis Jordan, Gerhard Schneider, Christian M Schulz
BACKGROUND: It has been shown that linear and non-linear heart rate variability (HRV) metrics are suitable to assess workload of anesthetists administering anesthesia. In pre-hospital emergency care, these parameters have not yet been evaluated. We hypothesized that heart rate (HR) and HRV metrics discriminate between differing workload levels of an emergency physician. METHODS: Electrocardiograms were obtained from 13 emergency physicians. Mean HR, ten linear and seven non-linear HRV metrics were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/29172729/association-of-insulin-resistance-and-autonomic-tone-in-patients-with-pregnancy-induced-hypertension
#8
Jing Guo, Guanghui Liu, Gang Guo
Pregnancy-induced hypertension (PIH) remains the main cause of maternal and fatal mortality. Insulin resistance (IR) and autonomic nervous system (ANS) imbalance are two principal drivers of PIH development. Few previous researches investigated the association between IR and ANS imbalance in Chinese PIH patients. 120 pregnant women were enrolled in our study, sixty healthy pregnant women (control group), fourty one gestational hypertension (GH group) and nineteen preeclampsia patients (PE group). The homeostasis model assessment of IR (HOMA-IR) and markers of ANS (plasma biomarkers and heart rate variability (HRV) components) were collected...
November 27, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29170531/analysis-of-the-respiratory-component-of-heart-rate-variability-in-the-cururu-toad-rhinella-schneideri
#9
Lucas A Zena, Cléo A C Leite, Leonardo S Longhini, Daniel P M Dias, Glauber S F da Silva, Lynn K Hartzler, Luciane H Gargaglioni, Kênia C Bícego
Beat-to-beat variation in heart rate (f H ) has been used as a tool for elucidating the balance between sympathetic and parasympathetic modulation of the heart. A portion of the temporal changes in f H is evidenced by a respiratory influence (cardiorespiratory interaction) on heart rate variability (HRV) with heartbeats increasing and decreasing within a respiratory cycle. Nevertheless, little is known about respiratory effects on HRV in lower vertebrates. By using frequency domain analysis, we provide the first evidence of a ventilatory component in HRV similar to mammalian respiratory sinus arrhythmia in an amphibian, the toad Rhinella schneideri...
November 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29167768/correlation-analysis-between-obstructive-sleep-apnea-syndrome-osas-and-heart-rate-variability
#10
Jiayong Xie, Wenjuan Yu, Zongren Wan, Fei Han, Qiaojun Wang, Rui Chen
Background: Heart rate variability (HRV) represents the sympathetic nervous system activity induced by apnea or hypopnea events among OSAS patients. However, few studies have been conducted to clarify the association between HRV parameters and polysomnography (PSG) diagnostic indices. In our study, we postulate that the prevalence of cardiac arrhythmias is associated with OSAS, and HRV parameters may be an effective method for OSAS screening. Methods: Overall, 168 participants had been collected from 2011 to 2016 in the Second Affiliated Hospital of Soochow University...
November 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/29157585/cardiac-autonomic-control-during-sleep-in-patients-with-myotonic-dystrophy-type-1-the-effects-of-comorbid-obstructive-sleep-apnea
#11
Eleonora Tobaldini, Giorgio Colombo, Monica Solbiati, Chiara Cogliati, Lucia Morandi, Alessandro Pincherle, Nicola Montano
OBJECTIVE: Myotonic dystrophy type 1 (DM1) is a hereditary myopathy characterized by an autosomal dominant inheritance with important cardiovascular and autonomic deregulation. DM1 patients have a high prevalence of obstructive sleep apnea (OSA), but the effects of this comorbidity on cardiovascular autonomic control (CAC) are unknown. The present study aimed to investigate CAC during sleep-wake cycle in DM1 patients, taking into account the effects of OSA comorbidity. METHOD: Twenty-three patients with a diagnosis of DM1, and a control group, underwent a complete polysomnographic study (PSG)...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29144026/heart-rate-variability-and-implication-for-sport-concussion
#12
REVIEW
Scott A Bishop, Ryan T Dech, Przemyslaw Guzik, J Patrick Neary
Finding sensitive and specific markers for sports-related concussion is both challenging and clinically important. Such biomarkers might be helpful in the management of patients with concussion (i.e. diagnosis, monitoring and risk prediction). Among many parameters, blood flow-pressure metrics and heart rate variability (HRV) have been used to gauge concussion outcomes. Reports on the relation between HRV and both acute and prolonged concussion recovery are conflicting. While some authors report on differences in the low-frequency (LF) component of HRV during postural manipulations and postexercise conditions, others observe no significant differences in various HRV measures...
November 16, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29137013/combination-of-ewing-test-heart-rate-variability-and-heart-rate-turbulence-analysis-for-early-diagnosis-of-diabetic-cardiac-autonomic-neuropathy
#13
Kun Lin, Liling Wei, Zhihua Huang, Qiong Zeng
The aim of this study was to compare and analyze Ewing test, heart rate variability (HRV), and heart rate turbulence (HRT) in the diagnosis of cardiac autonomic neuropathy (CAN) in diabetic patients.Ninety diabetic patients (age 18-78) and 20 nondiabetic control subjects were studied. Standard Ewing test and 24-hour Holter was performed in all participants to evaluate CAN. Patients with Ewing score ≥2 were classified as CAN+.The rate of CAN+ in diabetic patients [44.4% (40/90)] was higher than that in the controls [5% (1/20)] (P < ...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135450/influence-of-acquisition-frame-rate-and-video-compression-techniques-on-pulse-rate-variability-estimation-from-vppg-signal
#14
Luca Cerina, Luca Iozzia, Luca Mainardi
In this paper, common time- and frequency-domain variability indexes obtained by pulse rate variability (PRV) series extracted from video-photoplethysmographic signal (vPPG) were compared with heart rate variability (HRV) parameters calculated from synchronized ECG signals. The dual focus of this study was to analyze the effect of different video acquisition frame-rates starting from 60 frames-per-second (fps) down to 7.5 fps and different video compression techniques using both lossless and lossy codecs on PRV parameters estimation...
November 14, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29128939/ultra-shortened-time-domain-hrv-parameters-at-rest-and-following-exercise-in-athletes-an-alternative-to-frequency-computation-of-sympathovagal-balance
#15
Michael R Esco, Henry N Williford, Andrew A Flatt, Todd J Freeborn, Fabio Y Nakamura
PURPOSE: The primary purpose of this study was to determine the accuracy of the standard deviation of normal-to-normal intervals (SDNN) to root mean square of successive normal-to-normal interval differences (RMSSD) ratio from 1-min recordings (SDNN:RMSSD1-min) compared to criterion recordings, as well as its relationship to low-frequency-to-high-frequency ratio (LF:HF) at rest and following maximal exercise in a group of collegiate athletes. METHOD: Twenty athletes participated in the study...
November 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29122618/effects-of-tai-chi-exercise-on-cancer-related-fatigue-in-patients-with-nasopharyngeal-carcinoma-undergoing-chemoradiotherapy-a-randomized-controlled-trial
#16
Wei Zhou, Yong-Hui Wan, Qian Chen, Yan-Ru Qiu, Xiao-Min Luo
CONTEXT: Tai Chi exercise has been shown to improve cancer-related fatigue (CRF) and autonomic nervous system (ANS) balance in some cancer patients or survivors, however, such effects are yet to be verified in nasopharyngeal carcinoma (NPC) patients undergoing chemoradiotherapy. OBJECTIVES: To explore the effects of Tai Chi exercise on CRF in NPC patients undergoing chemoradiotherapy and then to evaluate ANS information indicated by heart rate variability (HRV) parameters and their association with CRF...
November 6, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29114415/effect-of-low-dose-remifentanil-on-postoperative-pain-relief-and-heart-rate-variability-in-post-anaesthesia-care-unit
#17
Shynma Uchida, Yuji Kadoi, Shigeru Saito
Objective: Several reports have shown the negligible adverse effects of low-dose remifentanil on the autonomic nervous system. We propose that the administration of low-dose remifentanil would be beneficial without adverse respiratory and hemodynamic effects. This study aimed to examine the effects of low-dose remifentanil on postoperative pain relief and heart rate variability (HRV) after surgery. Methods: In total, 20 patients, who underwent breast cancer surgery, were analysed for HRV in the post-anaesthesia care unit (PACU)...
October 2017: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/29113812/differential-associations-of-lower-cardiac-vagal-tone-with-insulin-resistance-and-insulin-secretion-in-recently-diagnosed-type-1-and-type-2-diabetes
#18
Dan Ziegler, Alexander Strom, Gidon Bönhof, Sonja Püttgen, Kálmán Bódis, Volker Burkart, Karsten Müssig, Julia Szendroedi, Daniel F Markgraf, Michael Roden
OBJECTIVE: It is unclear to which extent altered insulin sensitivity/secretion contribute to the development of diabetic cardiovascular autonomic neuropathy (CAN) characterized by diminished heart rate variability (HRV). We hypothesised that lower HRV is differentially associated with measures of insulin resistance and insulin secretion in recent-onset type 1 and type 2 diabetes. MATERIALS/METHODS: This cross-sectional study included participants from the German Diabetes Study with type 1 (n=275) or type 2 diabetes (n=450) with known diabetes duration ≤1 year and glucose-tolerant controls (n=81)...
November 4, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29107452/effectiveness-of-patient-empowerment-over-stress-related-to-knee-arthroplasty-surgery
#19
Jorge Mario Garzón-Rey, Adriana Arza-Valdés, Montserrat Nuevo-Gayoso, Jordi Aguiló
OBJECTIVE: This study aims to show evidence of the Empowerment Session's effectiveness through measurements of surgery related emotional stress before and after this session. METHOD: The study was performed on 41 patients with knee arthroplasty surgery prescription by measuring the evolution of their emotional stress generated by surgery expectative, during the empowerment session. Two sets of measurements per patient were performed, before and after the empowerment session...
October 26, 2017: Enfermería Clínica
https://www.readbyqxmd.com/read/29096956/experimental-study-on-the-human-thermal-comfort-based-on-the-heart-rate-variability-hrv-analysis-under-different-environments
#20
Hui Zhu, Hanqing Wang, Zhiqiang Liu, Duanru Li, Guangxiao Kou, Can Li
In order to study the human thermal comfort under different environments, the electrocardiogram (ECG) data of 6 subjects were recorded continuously under 60 environments composed by different air temperature, relative humidity and air speed that were created by an environmental chamber. Based on the ECG data, the frequency-domain method was adopted to obtain the heart rate variability (HRV) results. Among the HRV indices, the ratio of the low frequency power and high frequency power of the HRV analysis results (LF/HF), which reflects the balance of the autonomic nervous system, was selected as an indicator of the thermal comfort in the study...
October 30, 2017: Science of the Total Environment
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