keyword
MENU ▼
Read by QxMD icon Read
search

Low frequency hrv

keyword
https://www.readbyqxmd.com/read/28646783/heart-rate-variability-in-patients-with-major-depression-disorder-during-a-clinical-autonomic-test
#1
Xiuwen Chen, Rongqian Yang, Danni Kuang, Lei Zhang, Ruixue Lv, Xiong Huang, Fengchun Wu, Guohui Lao, Shanxing Ou
Major depression disorder (MDD) patients express dysfunction autonomic nervous system (ANS) and reduced heart rate variability (HRV). However, previous researches mainly focused on examining resting state without considering a series of stimulation tests of ANS between MDD patients and healthy people. For this purpose, 40 healthy people and 40 MDD patients participated and finished 10min clinical autonomic test-Ewing test. Parameters of HRV such as time domain, frequency domain, and nonlinear dynamical parameters were calculated...
June 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28640758/consecutive-ultra-short-term-heart-rate-variability-to-track-dynamic-changes-in-autonomic-nervous-system-during-and-after-exercise
#2
Xiang Chen, Ruijie Yao, Gezhen Yin, Jin Li
OBJECTIVE: Quantitative measurement of the dynamic changes in autonomic nervous system (ANS) during and after exercise has great significance in clinical, sports training and other fields. A consecutive ultra-short-term (30 s, UST) heart rate variability (HRV) method was proposed to track the exercise-induced autonomic control of heart rate (HR). APPROACH: Twenty-three healthy young men participated in the study. The first four stages of the Modified Bruce Protocol (S0-S3) were performed...
June 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28637038/synergic-impact-of-vascular-calcification-and-low-autonomic-tone-in-mortality-of-hemodialysis-patients
#3
Hwee-Yeong Ng, Shu-Kai Hsueh, Yueh-Ting Lee, Terry Ting-Yu Chiou, Pei-Chen Huang, Chien-Te Lee
BACKGROUND: Both cardiovascular calcification and autonomic dysfunction are frequently encountered in hemodialysis patients. We aimed to investigate the relationship between cardiovascular calcification and heart rate variability (HRV) and their influence on long-term outcome. METHODS: Seventy-eight hemodialysis patients underwent echocardiogram and radiography of the pelvis and hands to identify valvular and vascular calcification. HRV was evaluated using a commercial machine...
June 22, 2017: Nephron
https://www.readbyqxmd.com/read/28618917/reduced-cardiovascular-activation-following-chronic-stress-in-caregivers-of-people-with-anorexia-nervosa
#4
Ángel Romero-Martínez, Luis Moya-Albiol
Caring for offspring diagnosed with eating disorders (EDs) puts caregivers under high levels of chronic stress, which have negative consequences for their health. Unfortunately, caregivers have received little attention from mental health professionals. Chronic stress experienced by informal caregivers has been associated with the alteration of body homeostasis, and therefore, the functioning of various physiological systems. This could be the basis of health problems in informal caregivers of people with EDs...
June 15, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28617680/pulse-photoplethysmographic-amplitude-and-heart-rate-variability-during-laparoscopic-cholecystectomy-a-prospective-observational-study
#5
Riccardo Colombo, Ferdinando Raimondi, Alberto Corona, Andrea Marchi, Beatrice Borghi, Simone Pellegrin, Paola Bergomi, Tommaso Fossali, Stefano Guzzetti, Alberto Porta
BACKGROUND: Surgical stress affects the autonomic nervous system by increasing sympathetic outflow. One method of monitoring sympathetic activity is pulse photoplethysmographic analysis. From this two indices can be derived - autonomic nervous system state (ANSS) and ANSS index (ANSSi). It has recently been claimed that these indices can be used to measure sympathetic activity in anaesthetised patients, but their validity has not yet been demonstrated. OBJECTIVE: To measure changes in pulse photoplethysmographic indices and determine any agreement with autonomic nervous system modulation of the cardiovascular system in healthy study participants during surgery under general anaesthesia...
June 15, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28594089/validity-of-spectral-analysis-based-on-heart-rate-variability-from-1-minute-or-less-ecg-recordings
#6
Naomi Takahashi, Akira Kuriyama, Hoshinori Kanazawa, Yoshimitsu Takahashi, Takeo Nakayama
BACKGROUND: To broaden the utility of heart rate variability (HRV) in clinical medicine and mass screening, results based on shorter electrocardiogram (ECG) recordings require validation with those based on standard five-minute recordings. We investigated the association between HRV variables obtained from five-minute ECGs with those obtained from ECGs shorter than five minutes. METHODS: Twenty-two participants aged 20 to 69 years underwent five-minute resting ECG recordings in the supine position with natural breathing...
June 8, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28592377/normative-values-of-short-term-heart-rate-variability-parameters-in-koreans-and-their-clinical-value-for-the-prediction-of-mortality
#7
Chan-Hee Lee, Jung-Hee Lee, Jang-Won Son, Ung Kim, Jong-Seon Park, Jeon Lee, Dong-Gu Shin
BACKGROUND: Heart rate variability (HRV) analysis is an important clinical tool for characterising cardiac autonomic status. We sought to determine the normative values and characteristics of the HRV parameters derived from a short-term study in Koreans and to determine their clinical role in predicting mortality. METHODS: A total of 1828 consecutive patients (range 20-84 years, men 64.8%) with no serious comorbid conditions were recruited. The RR intervals from 10-minute electrocardiograms were used for computation of the following HRV parameters: conventional time- and frequency-domain measures and nonlinear measures...
May 17, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28585146/deceleration-capacity-a-novel-measure-for-autonomic-nervous-system-in-patients-with-vasovagal-syncope-on-tilt-table-testing
#8
Fen Huang, Chun-Fang Xu, Xiao-Yan Deng, Ping Zuo, Fan Lin, Jing-Jing Fan, Wen-Jia Xu, Xiao-Yun Yang
This study was to investigate the changes of autonomic nerve function and hemodynamics in patients with vasovagal syncope (VVS) during head-up tilt-table testing (HUT). HUT was performed in 68 patients with unexplained syncope and 18 healthy subjects served as control group. According to whether bradycardia, hypotension or both took place during the onset of syncope, the patients were divided during the test into three subgroups: vasodepressor syncope (VD), cardioinhibitory syncope (CI) and mixed syncope (MX) subgroups...
June 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28572771/measures-of-heart-rate-variability-in-24-h-ecgs-depend-on-age-but-not-gender-of-healthy-children
#9
Waldemar Bobkowski, Magdalena E Stefaniak, Tomasz Krauze, Katarzyna Gendera, Andrzej Wykretowicz, Jaroslaw Piskorski, Przemyslaw Guzik
Many methods computing heart rate variability (HRV) have been applied in studies in children. Not all of these methods have a comprehensive physiological interpretation, and not all of studies are in agreement with the Task Force Standards on HRV from 1996, and the New Joint Position Statement on the advances of HRV from 2015. The study aim was to analyse HRV in the 24-h ECGs of healthy children by the Poincare plots and Lomb-Scargle periodograms, and to follow proper HRV recommendations. Additionally, we investigated the associations between age, children's sex and measured HRV indices...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28570433/trauma-and-autonomic-dysregulation-episodic-versus-systemic-negative-affect-underlying-cardiovascular-risk-in-posttraumatic-stress-disorder
#10
Paul A Dennis, Nathan A Kimbrel, Andrew Sherwood, Patrick S Calhoun, Lana L Watkins, Michelle F Dennis, Jean C Beckham
OBJECTIVE: Posttraumatic stress disorder (PTSD) has been linked to elevated heart rate (HR) and reduced heart rate variability (HRV) in cross-sectional research. Recent evidence suggests that this link may be driven by individual differences in autonomic arousal associated with momentary negative affect (NA). Using ecological momentary assessment (EMA) of NA and minute-to-minute HR/HRV monitoring, we examined whether NA-related HR/HRV mediated the association of PTSD symptom severity with 24-hour HRV and endothelial functioning...
June 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28566656/low-heart-rate-variability-and-sympathetic-dominance-modifies-the-association-between-insulin-resistance-and-metabolic-syndrome%C3%A3-the-toon-health-study
#11
Isao Saito, Koutatsu Maruyama, Eri Eguchi, Tadahiro Kato, Ryoichi Kawamura, Yasunori Takata, Hiroshi Onuma, Haruhiko Osawa, Takeshi Tanigawa
BACKGROUND: Insulin resistance is strongly associated with metabolic syndrome (MetS), but it is not known how this association is influenced by the autonomic nervous system, which controls insulin secretion.Methods and Results:The subjects were 2,016 individuals aged 30-79 years enrolled between 2009 and 2012. MetS was determined using the harmonized MetS definition, which includes waist circumference, blood pressure, triglycerides, high-density lipoprotein cholesterol, and fasting glucose...
May 30, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28558953/are-heart-rate-dynamics-in-the-transition-from-rest-to-submaximal-exercise-related-to-maximal-cardiorespiratory-responses-in-copd
#12
Adriana Mazzuco, Wladimir Musetti Medeiros, Aline Soares de Souza, Maria Clara Noman Alencar, José Alberto Neder, Audrey Borghi-Silva
BACKGROUND: Poor exercise capacity is an important negative prognostic marker in patients with chronic obstructive pulmonary disease (COPD). Heart rate variability (HRV) responses can indicate alterations in cardiac autonomic control. Nevertheless, it remains unclear whether these abnormalities are related to cardiorespiratory responses to exercise in these patients. OBJECTIVE: To evaluate whether HRV at rest and submaximal exercise are related to impaired cardiopulmonary responses to exercise in COPD patients...
May 20, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28558638/heart-rate-variability-indexes-in-dementia-a-systematic-review-with-a-quantitative-analysis
#13
Vanessa Pereira da Silva, Bruno Ribeiro Ramalho Oliveira, Roger Gomes Tavares Mello, Helena Moraes, Andrea Camaz Deslandes, Jerson Laks
BACKGROUND: Decreased HRV indexes indicate a low vagal activity and may be associated with development of dementia. The neurodegenerative process is associated with the cardiovascular autonomic control. OBJECTIVE: The aim of this systematic review was to investigate the effect size magnitude of the HRV indexes in the evaluation of autonomic dysfunction in elderly people with dementia. METHODS: PubMed (Medline), Web of Science, Scopus, Scielo, Lilacs, and APA Psycnet were consulted...
May 30, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28558089/analysis-of-heart-rate-variability-before-and-during-tilt-test-in-patients-with-cardioinhibitory-vasovagal-syncope
#14
Cláudia Madeira Miranda, Rose Mary Ferreira Lisboa da Silva
BACKGROUND: Cardioinhibitory vasovagal response is uncommon during the tilt test (TT). Heart rate variability (HRV) by use of spectral analysis can distinguish patients with that response. OBJECTIVE: To compare the HRV in patients with cardioinhibitory vasovagal syncope (case group - G1) with that in patients without syncope and with negative response to TT (control group - G2). METHODS: 64 patients were evaluated (mean age, 36.2 years; 35 men) and submitted to TT at 70 degrees, under digital Holter monitoring...
December 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28553088/blood-pressure-reactivity-to-mental-stress-is-attenuated-following-resistance-exercise-in-older-hypertensive-women
#15
Rafael Gauche, Ricardo M Lima, Jonathan Myers, André B Gadelha, Silvia Gr Neri, Claudia Lm Forjaz, Lauro C Vianna
PURPOSE: This study aimed to investigate the effects of resistance exercise (RE) on autonomic control and blood pressure (BP) reactivity during mental stress (MS) in treated older hypertensive women. METHODS: Ten older hypertensive women (age =71.1±5.5 years; body mass index =24.2±3.9; mean BP [MBP] =85.4±3.5) underwent a protocol consisting of BP and heart rate variability (HRV) output assessments at baseline and during MS, and these measurements were taken before and 60 minutes after two bouts of RE (traditional and circuit)...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28551162/association-of-sympathovagal-imbalance-with-cognitive-impairment-in-type-2-diabetes
#16
Pal Auroprajna, Basanta Manjari Naik, Jaya Prakash Sahoo, Gorantla Shravya Keerthi, Manohar Pavanya, Gopal Krushna Pal
OBJECTIVE: Sympathovagal imbalance (SVI) has been reported to be associated with metabolic derangements in type 2 diabetes. We investigated the association of SVI with cognitive impairment in patients with type 2 diabetes. METHODS: Patients with a new diagnosis of type 2 diabetes (n=43) and age-matched healthy control subjects (n=43) were recruited for the study. Body mass index and blood pressure measurements were recorded. SVI was assessed by spectral analysis of heart rate variability (HRV), and cognitive function was assessed by recording the positive wave that appears in 300 milliseconds from application of stimulus in event-related potential tracing (P300)...
May 24, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28546681/heart-rate-variability-changes-during-and-after-the-practice-of-bhramari-pranayama
#17
L Nivethitha, N K Manjunath, A Mooventhan
BACKGROUND: Yoga is an ancient Indian science as well as the way of life. Pranayama is one of the most important yogic practices. Bhramari pranayama was shown to produce a reduction in blood pressure after the practice and thus reported to produce parasympathetic activity. However, there are no known studies reported the heart rate variability (HRV) changes either during or after the practice of Bhramari. Hence, this study aims at evaluating the HRV changes during and after the practice...
May 2017: International Journal of Yoga
https://www.readbyqxmd.com/read/28544507/the-effect-of-binaural-beat-technology-on-the-cardiovascular-stress-response-in-military-service-members-with-postdeployment-stress
#18
MeLisa A Gantt, Stephanie Dadds, Debra S Burns, Dale Glaser, Angelo D Moore
PURPOSE: To assess the efficacy of embedded theta brainwave frequency in music using binaural beat technology (BBT) compared to music alone on the cardiovascular stress response in military service members with postdeployment stress. DESIGN: A double-blinded, randomized, pre- and postintervention trial. METHODS: Seventy-four military services members with complaint of postdeployment stress were randomized to either music with BBT or music alone...
May 23, 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28538315/evaluation-of-the-effectiveness-of-compression-garments-on-autonomic-nervous-system-recovery-after-exercise
#19
Alessandro Piras, Giorgio Gatta
The aim of this investigation was to evaluate the recovery pattern of a whole-body compression garment on hemodynamic parameters and on autonomic nervous system (ANS) activity after a swimming performance. Ten young male athletes were recruited and tested in 2 different days, with and without wearing the garment during the recovery phase. After a warm-up of 15 minutes, athletes were instructed to perform a maximal 400-m freestyle swimming event, and then time series of beat-to-beat intervals for heart rate variability (HRV), baroreflex sensitivity (BRS), and hemodynamic parameters were recorded for 90 minutes of recovery...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28534047/polysomnographic-heart-rate-variability-indices-and-atrial-ectopy-associated-with-incident-atrial-fibrillation-risk-in-older-community-dwelling-men
#20
Dileep Raman, Farhad Kaffashi, Li-Yung Lui, William H Sauer, Susan Redline, Peter Stone, Peggy M Cawthon, Katie L Stone, Kristine E Ensrud, Sonia Ancoli-Israel, Kenneth Loparo, Reena Mehra
BACKGROUND: Autonomic dysfunction contributes to atrial fibrillation (AF). OBJECTIVE: We hypothesized that polysomnogram (PSG)-based heart rate variability (HRV) autonomic function biomarkers are associated with incident AF and these associations are modified by measures of sleep disordered breathing (SDB). METHODS: 2350 participants of a multi-center prospective study (Outcomes of Sleep Disorders in Older Men Study) without baseline AF underwent sleep studies with incident adjudicated AF follow up (8...
May 2017: JACC. Clinical Electrophysiology
keyword
keyword
95954
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"