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HEART RATE VARIABILITY:

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https://www.readbyqxmd.com/read/30110187/blood-pressure-and-heart-rate-variability-in-primary-open-angle-glaucoma-and-normal-tension-glaucoma
#1
Friederike Lindemann, David Kuerten, Eva Koch, Matthias Fuest, Claudia Fischer, Andreas Voss, Niklas Plange
PURPOSE: Vascular dysfunction and ischemia are believed to play an important part in the pathogenesis of glaucoma and especially of normal tension glaucoma (NTG). The aim of the present study was to analyze the blood pressure (BP) and heart rate variability patterns in patients with primary open-angle glaucoma (POAG) and NTG compared with controls. METHODS: In total, 37 patients with POAG, 27 patients with NTG, and 82 control subjects were included in a prospective clinical validation study...
August 15, 2018: Current Eye Research
https://www.readbyqxmd.com/read/30110103/the-effect-of-therapeutic-listening-on-anxiety-and-fear-among-surgical-patients-randomized-controlled-trial
#2
Ana Cláudia Mesquita Garcia, Talita Prado Simão-Miranda, Ana Maria Pimenta Carvalho, Paula Condé Lamparelli Elias, Maria da Graça Pereira, Emilia Campos de Carvalho
OBJECTIVE: To investigate the effect of therapeutic listening on state anxiety and surgical fears in preoperative colorectal cancer patients. METHOD: A randomized controlled trial with 50 patients randomly allocated in the intervention group (therapeutic listening) (n = 25) or in the control group (n = 25). The study evaluated the changes in the variables state anxiety, surgical fears and physiological variables (salivary alpha-amylase, salivary cortisol, heart rate, respiratory rate and blood pressure)...
August 9, 2018: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/30110047/heart-rate-variability-in-coexisting-diabetes-and-hypertension
#3
EDITORIAL
Paula F Martinez, Marina P Okoshi
No abstract text is available yet for this article.
July 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/30110046/effects-of-coexistence-hypertension-and-type-ii-diabetes-on-heart-rate-variability-and-cardiorespiratory-fitness
#4
Daniela Bassi, Ramona Cabiddu, Renata G Mendes, Natália Tossini, Vivian M Arakelian, Flávia C R Caruso, José C Bonjorno Júnior, Ross Arena, Audrey Borghi-Silva
BACKGROUND: Type 2 diabetes Mellitus (T2DM) is associated with cardiac autonomic dysfunction, which is an independent predictor of mortality in chronic diseases. However, whether the coexistence of systemic arterial hypertension (HTN) with DMT2 alters cardiac autonomic modulation remains unknown. OBJECTIVE: To evaluate the influence of HTN on cardiac autonomic modulation and cardiorespiratory fitness in subjects with DMT2. METHODS: 60 patients of both genders were evaluated and allocated to two groups: DMT2 patients (n = 32; 51 ± 7...
July 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/30109525/contact-force-sensing-catheters-performance-in-an-ex-vivo-porcine-heart-model
#5
Eduardo Franco, Daniel Rodríguez Muñoz, Roberto Matía, Antonio Hernández-Madrid, Inmaculada Sánchez Pérez, José Luis Zamorano, Javier Moreno
PURPOSE: Contact force (CF) catheters are useful to address proper contact during ablation. However, interactions between the ablation process, or its associated irrigation flow changes, with the CF sensing may translate into unexpected CF value fluctuations. We aimed to test for unintentional CF value variations during radiofrequency applications at a fixed applied force, with two commercially available catheters (TactiCath™ and SmartTouch™), and to evaluate its theoretical clinical significance by correlating CF-derived automatic ablation algorithms (force-time integral and lesion index) and actual lesion size at two standard CF values...
August 14, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/30109153/electrocardiogram-sampling-frequency-range-acceptable-for-heart-rate-variability-analysis
#6
Ohhwan Kwon, Jinwoo Jeong, Hyung Bin Kim, In Ho Kwon, Song Yi Park, Ji Eun Kim, Yuri Choi
Objectives: Heart rate variability (HRV) has gained recognition as a noninvasive marker of autonomic activity. HRV is considered a promising tool in various clinical scenarios. The optimal electrocardiogram (ECG) sampling frequency required to ensure sufficient precision of R-R intervals for HRV analysis has not yet been determined. Here, we aimed to determine the acceptable ECG sampling frequency range by analyzing ECG signals from patients who visited an emergency department with the chief complaint of acute intoxication or overdose...
July 2018: Healthcare Informatics Research
https://www.readbyqxmd.com/read/30108206/a-risk-score-model-of-30-day-readmission-in-ulcerative-colitis-after-colectomy-or-proctectomy
#7
Lindsay A Sobotka, Syed G Husain, Somashekar G Krishna, Alice Hinton, Ravi Pavurula, Darwin L Conwell, Cheng Zhang
INTRODUCTION: The Center for Medicare and Medicaid Services established 30-day readmission rate as a key metric in measuring high-value, cost-conscious care; therefore, our aim is to develop a risk score for 30-day readmission in ulcerative colitis (UC) patients undergoing colectomy or proctectomy. METHODS: This study used data from the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) participant user file (2011-2015). Patients with UC undergoing colectomy or proctectomy were identified using ICD-9, 10, and CPT codes...
August 15, 2018: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/30107521/loneliness-and-telomere-length-immune-and-parasympathetic-function-in-associations-with-accelerated-aging
#8
Stephanie J Wilson, Alex Woody, Avelina C Padin, Jue Lin, William B Malarkey, Janice K Kiecolt-Glaser
Background: Lonely people's heightened risks for chronic health conditions and early mortality may emerge in part through cellular aging. Lonelier people have more severe sympathetic responses to acute stress, increasing their risk for herpesvirus reactivation, a possible path to shorter telomeres. Parasympathetic function may modulate this risk. Purpose: The current study aimed to examine the associations among loneliness, herpesvirus reactivation, and telomere length, with parasympathetic activity as a moderator, in healthy middle-aged and older adults...
August 13, 2018: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/30107195/poincar%C3%A3-plot-indices-as-measures-of-sympathetic-cardiac-regulation-responses-to-psychological-stress-and-associations-with-pre-ejection-period
#9
Saif Rahman, Mathew Habel, Richard J Contrada
The Poincaré plot is a visual representation of the R-R time series within a Cartesian plane constructed by plotting each R-R interval as a function of the previous one. The plot can be characterized by parameters that quantify the standard deviation (SD) of short- and long-term R-R interval variability (SD1 and SD2, respectively). Claims regarding the use of Poincaré plot analysis as an alternative to conventional time-domain and spectral analytic measures of parasympathetic contributions to heart rate variability (HRV) have been evaluated somewhat extensively...
August 11, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/30106997/correction-developmental-milestones-of-the-autonomic-nervous-system-revealed-via-longitudinal-monitoring-of-fetal-heart-rate-variability
#10
Uwe Schneider, Franziska Bode, Alexander Schmidt, Samuel Nowack, Anja Rudolph, Eva-Maria Dölker, Peter Schlattmann, Theresa Götz, Dirk Hoyer
[This corrects the article DOI: 10.1371/journal.pone.0200799.].
2018: PloS One
https://www.readbyqxmd.com/read/30105096/prevalence-and-outcome-of-operative-vaginal-delivery-among-mothers-who-gave-birth-at-jimma-university-medical-center-southwest-ethiopia
#11
Zenebe Hubena, Ahadu Workneh, Yibeltal Siraneh
Background: Operative vaginal deliveries (OVD) are vaginal deliveries accomplished with the use of a vacuum device or forceps. If it is technically feasible and can be safely accomplished, termination of second stage labor by operative vaginal delivery is indicated in any condition threatening the mother or fetus that is likely to be relieved by delivery. Hence, the objective of this study is to assess the prevalence, common indication, outcome, and associated factors of operative vaginal delivery among mothers who gave birth in Jimma University Medical Center (JUMC)...
2018: Journal of Pregnancy
https://www.readbyqxmd.com/read/30104867/comparison-of-the-acute-effects-of-traditional-versus-high-velocity-resistance-training-on-metabolic-cardiovascular-and-psychophysiological-responses-in-elderly-hypertensive-women
#12
Vânia Silva Macedo Orsano, Wilson Max Almeida Monteiro de Moraes, Nuno Manuel Frade de Sousa, Felipe Carmo de Moura, Ramires Alsamir Tibana, Alessandro de Oliveira Silva, Silvana Schwerz Funghetto, Brad J Schoenfeld, Jonato Prestes
Objectives: The aim of the present study was to compare the acute effects of traditional resistance training (RT) versus high velocity RT (HVRT) on metabolic, cardiovascular, and psychophysiological responses in elderly hypertensive women. Methods: Fifteen elderly women (mean age ± standard deviation, 67.1±6.9 years) classified as having hypertension stage 1 or 2 were randomly allocated to complete traditional RT or HVRT; 1 week later, subjects allocated to RT completed the HVRT session and vice-versa...
2018: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/30104144/the-role-of-physiological-arousal-for-self-reported-emotional-empathy
#13
Christian E Deuter, Jan Nowacki, Katja Wingenfeld, Linn K Kuehl, Johannes B Finke, Isabel Dziobek, Christian Otte
The capacity to represent the emotional and mental states of others is referred to by the concept of empathy. Empathy further differentiates into an emotional and a cognitive subcomponent, which in turn is known to require a tacit perspective-taking process. However, whether the empathizer by himself needs to enter an affective state as a necessary precondition for emotional empathy remains a matter of debate. If empathy would require a vicarious emotional reaction, specific physiological markers of affective responding should be detectable in the empathizing person...
July 26, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/30104037/design-of-high-performance-qrs-complex-detector-for-wearable-healthcare-devices-using-biorthogonal-spline-wavelet-transform
#14
Deepak Berwal, Ashish Kumar, Yogendera Kumar
A high performance QRS complex detector applicable for wearable healthcare devices is proposed in the present work. Since, higher SNR results in better detection accuracy and lesser number of coefficients reduces the hardware resources as well as power dissipation during on chip implementation. Biorthogonal spline wavelet transform is chosen for the proposed detector as it has high signal to noise ratio (SNR) and uses only four coefficients for decomposition. In the proposed approach, a Biorthogonal wavelet filter bank with fourth level decomposition is first used to separate the different frequency components and then a fourth level wavelet filter bank is used to get the denoised electrocardiogram (ECG) signals...
August 10, 2018: ISA Transactions
https://www.readbyqxmd.com/read/30104034/heart-rate-variability-as-a-marker-of-healthy-ageing
#15
Jason Por How Tan, Jessica Elise Beilharz, Uté Vollmer-Conna, Erin Cvejic
BACKGROUND: With population ageing a significant concern, modifiable factors contributing to healthy ageing must be identified. Autonomic responding reflected by heart rate variability (HRV) has well-established links to general health and wellbeing in younger populations; but has yet to be explored in older individuals. METHODS: Forty-five healthy participants (49-82 years old) completed questionnaires about sleep and physical and psychological health. Autonomic activity was measured during rest and whilst completing a computerised battery of cognitive tasks...
August 3, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/30103376/validation-of-the-apple-watch-for-heart-rate-variability-measurements-during-relax-and-mental-stress-in-healthy-subjects
#16
David Hernando, Surya Roca, Jorge Sancho, Álvaro Alesanco, Raquel Bailón
Heart rate variability (HRV) analysis is a noninvasive tool widely used to assess autonomic nervous system state. The market for wearable devices that measure the heart rate has grown exponentially, as well as their potential use for healthcare and wellbeing applications. Still, there is a lack of validation of these devices. In particular, this work aims to validate the Apple Watch in terms of HRV derived from the RR interval series provided by the device, both in temporal (HRM (mean heart rate), SDNN, RMSSD and pNN50) and frequency (low and high frequency powers, LF and HF) domain...
August 10, 2018: Sensors
https://www.readbyqxmd.com/read/30103243/risk-score-for-prediction-of-10-year-atrial-fibrillation-a-community-based-study
#17
Doron Aronson, Varda Shalev, Rachel Katz, Gabriel Chodick, Diab Mutlak
PURPOSE:  We used a large real-world data from community settings to develop and validate a 10-year risk score for new-onset atrial fibrillation (AF) and calculate its net benefit performance. METHODS:  Multivariable Cox proportional hazards model was used to estimate effects of risk factors in the derivation cohort ( n  = 96,778) and to derive a risk equation. Measures of calibration and discrimination were calculated in the validation cohort ( n  = 48,404)...
August 13, 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/30102963/heart-rate-variability-changes-and-its-association-with-the-development-of-severe-retinopathy-of-prematurity
#18
Mohamed A Hussein, Nanfu Deng, Craig Rusin, Evelyn E Paysse, Amit Bhatt, David K Coats
PURPOSE: To evaluate differences in autonomic nervous system (ANS) activity associated with the development of retinopathy of prematurity. METHODS: Heart rate variability (HRV) as an indicator of ANS activity was calculated in two groups of premature infants: (1) a treatment group of infants who developed type 1 ROP and underwent treatment and (2) a control group of infants who did not develop ROP more severe than stage 1 and who were matched to the treatment group in terms of age, weight, and similar risk factors, including similar frequency of intraventricular hemorrhage, bronchopulmonary dysplasia, and sepsis...
August 10, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/30102743/feasibility-safety-and-reliability-of-exercise-testing-using-the-combined-arm-leg-cruiser-ergometer-in-subjects-with-a-lower-limb-amputation
#19
Elisabeth K Simmelink, Johan B Wempe, Jan H B Geertzen, Lucas H V van der Woude, Rienk Dekker
BACKGROUND: Physical fitness of patients with a lower limb amputation predicts their walking ability and may be improved by physical exercise and training. A maximal exercise test is recommended prior to training in order to determine cardiovascular risks and design exercise programs. A potentially suitable ergometer for maximal exercise testing in patients with a lower limb amputation is the combined arm-leg (Cruiser) ergometer. The aim of this study was to determine feasibility, safety, and reliability of (sub)maximal exercise testing on the Cruiser ergometer in subjects with a lower limb amputation...
2018: PloS One
https://www.readbyqxmd.com/read/30102603/ranking-of-the-most-reliable-beat-morphology-and-heart-rate-variability-features-for-detection-of-atrial-fibrillation-in-short-single-lead-ecg
#20
Ivaylo Christov, Vessela Krasteva, Iana Simova, Tatiana Neycheva, Ramun Schmid
Objective
 This study participated in the 2017 PhysioNet/CinC Challenge dedicated to classification of atrial fibrillation (AF), normal sinus rhythm (Normal), other arrhythmia (Other) and strong noise, using single lead electrocardiogram (ECG) recordings with duration <60s. The aim is to apply a linear threshold-based strategy for arrhythmia classification, ranking the most powerful time-domain ECG features that could be easily reproduced on any platform. 
 
 Approach 
 An algorithm for time-domain ECG analysis was designed to extract 44 features with focus on: noise detection; heart rate variability analysis (HRV); beat morphology analysis and delineation of P, QRS, T waves on robust average beat; detection of atrial activity by the presence of P-wave in the average beat and atrial fibrillatory f-waves during TQ intervals...
August 13, 2018: Physiological Measurement
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