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https://www.readbyqxmd.com/read/28437466/stage-call-cardiovascular-reactivity-to-audition-stress-in-musicians
#1
Theerasak Chanwimalueang, Lisa Aufegger, Tricia Adjei, David Wasley, Cinzia Cruder, Danilo P Mandic, Aaron Williamon
Auditioning is at the very center of educational and professional life in music and is associated with significant psychophysical demands. Knowledge of how these demands affect cardiovascular responses to psychosocial pressure is essential for developing strategies to both manage stress and understand optimal performance states. To this end, we recorded the electrocardiograms (ECGs) of 16 musicians (11 violinists and 5 flutists) before and during performances in both low- and high-stress conditions: with no audience and in front of an audition panel, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28437372/heart-rate-modification-of-cardiac-output-following-cardiac-surgery-the-importance-of-cardiac-time-intervals
#2
Guido Tavazzi, Andy Kontogeorgis, Fabio Guarracino, Niels Bergsland, Ana Martinez-Naharro, John Pepper, Susanna Price
OBJECTIVES: Inadequate cardiac output is associated with a poor outcome following cardiac surgery and is generally modified by the use of positive inotropic agents, volume resuscitation, and pacing. Echocardiography-guided pacemaker optimization is used in the outpatient setting, using different variables including total isovolumic time and the Tei index. We sought to determine the acute impact of heart rate on cardiac electromechanics, cardiac output, and stroke volume in the perioperative setting...
April 21, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28436907/reliability-of-lagged-poincar%C3%A3-plot-parameters-in-ultra-short-heart-rate-variability-series-application-on-affective-sounds
#3
Mimma Nardelli, Alberto Greco, Juan Bolea, Gaetano Valenza, Enzo Pasquale Scilingo, Raquel Bailon
The number of studies about ultra-short cardiovascular time series is increasing because of the demand for mobile applications in telemedicine and e-health monitoring. However, the current literature still needs a proper validation of heartbeat nonlinear dynamics assessment from ultra-short time series. This paper reports on the reliability of the Lagged Poincaré Plot (LPP) parameters - calculated from ultra-short cardiovascular time series. Reliability is studied on simulated as well as on real RR series...
April 18, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28436723/asymptomatic-peripheral-artery-disease-can-limit-maximal-exercise-capacity-in-chronic-obstructive-pulmonary-disease-patients-regardless-of-airflow-obstruction-and-lung-hyperinflation
#4
Ernesto Crisafulli, Chiara Scelfo, Panagiota Tzani, Marina Aiello, Giuseppina Bertorelli, Alfredo Chetta
Background Silent/asymptomatic peripheral artery disease may occur in patients with chronic obstructive pulmonary disease, but it is poorly investigated. The primary aim of this study was to evaluate in chronic obstructive pulmonary disease patients the impact of asymptomatic/silent peripheral artery disease on maximal exercise capacity; the secondary aim was to search for predictors of peripheral artery disease. Methods We prospectively enrolled chronic obstructive pulmonary disease outpatients. Data on anthropometric characteristics, lung function, cardiopulmonary exercise test and ankle-brachial index were recorded...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28436467/prediction-of-intraventricular-haemorrhage-in-preterm-infants-using-time-series-analysis-of-blood-pressure-and-respiratory-signals
#5
Jacqueline Huvanandana, Chinh Nguyen, Cindy Thamrin, Mark Tracy, Murray Hinder, Alistair L McEwan
Despite the decline in mortality rates of extremely preterm infants, intraventricular haemorrhage (IVH) remains common in survivors. The need for resuscitation and cardiorespiratory management, particularly within the first 24 hours of life, are important factors in the incidence and timing of IVH. Variability analyses of heart rate and blood pressure data has demonstrated potential approaches to predictive monitoring. In this study, we investigated the early identification of infants at a high risk of developing IVH, using time series analysis of blood pressure and respiratory data...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28436399/identification-of-patients-with-preeclampsia-from-normal-subjects-using-wavelet-based-spectral-analysis-of-heart-rate-variability
#6
A Hossen, A Barhoum, D Jaju, V Gowri, K Al-Hashmi, M O Hassan, L Al-Kharusi
BACKGROUND: The spectral analysis of the heart rate variability (HRV) shows a decrease in the power of the high frequency (HF) component in preeclamptic pregnancy compared with normal pregnancy; such a decrease is associated with an increase in the low frequency (LF) and the very low frequency (VLF) power. The physiological interpretation is that preeclamptic pregnancy is associated with a facilitation of sympathetic regulation and an attenuation of parasympathetic influence of HR compared with non-pregnancy and normal pregnancy...
April 14, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28436270/does-physiological-stress-slowdown-wound-healing-in-patients-with-diabetes
#7
Javad Razjouyan, Gurtej Singh Grewal, Talal K Talal, David G Armstrong, Joseph L Mills, Bijan Najafi
BACKGROUND: Poor healing is an important contributing factor to amputation among patients with diabetic foot ulcers (DFUs). Physiological stress may slow wound healing and increase susceptibility to infection. OBJECTIVES: The objective was to examine the association between heart rate variability (HRV) as an indicator of physiological stress response and healing speed (HealSpeed) among outpatients with active DFUs. DESIGN AND METHODS: Ambulatory patients with diabetes with DFUs (n = 25, age: 59...
April 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28436207/racial-differences-in-the-association-between-heart-rate-variability-and-left-ventricular-mass
#8
LaBarron K Hill, Lana L Watkins, Alan L Hinderliter, James A Blumenthal, Andrew Sherwood
PURPOSE: Increased left ventricular mass (LVM) is an early precursor of target organ damage due to hypertension. Diminished parasympathetic cardiac control has been linked to both hypertension onset and left ventricular impairment; however, emerging evidence suggests that this pattern may be different in African Americans. The present study sought to determine if race impacts the relationship between parasympathetic cardiac control and LVM. METHODS: LVM was assessed via echocardiography in a sample (N = 148) of African American and White adults (Mean age = 33...
April 24, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28436092/effects-of-creatine-supplementation-on-cardiac-autonomic-functions-in-bodybuilders
#9
Kadir Uğur Mert, Serdar Ilgüy, Muhammet Dural, Gurbet Özge Mert, Engin Özakin
Bodybuilder-type workouts may affect heart rate variability (HRV), which has considerable potential to assess the role of autonomic nervous system (ANS). A scientifically designed approach is necessary for bodybuilders to achieve better results while protecting their health. In this study, we aimed to investigate HRV parameters in bodybuilders compared to healthy control subjects and effects of creatine supplementation. Total 48 male participants (16 controls, 16 supplement(-), 16 supplement(+) were evaluated in our study...
April 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28435239/pulmonary-rehabilitation-for-copd-improves-exercise-time-rather-than-exercise-tolerance-effects-and-mechanisms
#10
Keisuke Miki, Ryoji Maekura, Seigo Kitada, Mari Miki, Kenji Yoshimura, Hiroshi Yamamoto, Toshiko Kawabe, Hiroyuki Kagawa, Yohei Oshitani, Akitoshi Satomi, Kohei Nishida, Nobuhiko Sawa, Kimiko Inoue
BACKGROUND: COPD patients undergoing pulmonary rehabilitation (PR) show various responses. The purpose of this study was to investigate the possible mechanisms and predictors of the response to PR in COPD patients. METHODS: Thirty-six stable COPD patients underwent PR including a 4-week high-intensity exercise training program, and they were evaluated by cardiopulmonary exercise testing. All patients (mean age 69 years, severe and very severe COPD 94%) were classified into four groups by whether the exercise time (Tex) or the peak oxygen uptake [Formula: see text] increased after PR: two factors increased (both the Tex and the peak [Formula: see text] increased); two factors decreased; time only increased (the Tex increased, but the peak [Formula: see text] economized); and [Formula: see text] only increased (the Tex decreased, but the peak [Formula: see text] increased)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28433517/causal-attribution-and-psychobiological-response-to-competition-in-young-men
#11
A Salvador, R Costa, V Hidalgo, E González-Bono
A contribution to a special issue on Hormones and Human Competition. Psychoneuroendocrine effects of competition have been widely accepted as a clear example of the relationship between androgens and aggressive/dominant behavior in humans. However, results about the effects of competitive outcomes are quite heterogeneous, suggesting that personal and contextual factors play a moderating role in this relationship. To further explore these dimensions, we aimed to examine (i) the effect of competition and its outcome on the psychobiological response to a laboratory competition in young men, and (ii) the moderating role of some cognitive dimensions such as causal attributions...
April 19, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28432961/diurnal-patterns-and-relationships-between-physiological-and-self-reported-stress-in-patients-with-epilepsy-and-psychogenic-non-epileptic-seizures
#12
Barbora Novakova, Peter R Harris, Markus Reuber
PURPOSE: Patients with epilepsy and those with psychogenic non-epileptic seizures (PNES) experience high levels of stress and stress is one of the most frequently self-identified seizure precipitants. Although stress is a multifaceted phenomenon, few studies have systematically examined its different components in patients with seizures. The aim of this study was therefore to describe diurnal patterns of psychological and physiological measures of stress in patients with epilepsy and patients with PNES, and explore their relationships to each other in order to improve our understanding of the mechanisms underlying stress and seizure occurrence in these patients...
April 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28432659/current-role-of-blood-and-urine-biomarkers-in-the-clinical-care-of-adults-with-congenital-heart-disease
#13
REVIEW
Saurabh Rajpal, Laith Alshawabkeh, Alexander R Opotowsky
PURPOSE OF REVIEW: There is an increasing number of adult patients with congenital heart disease (CHD). While several biomarkers have been validated and integrated into general cardiology clinical practice, these tests are often applied to adults with CHD in the absence of disease-specific validation. Although these patients are often grouped into a single population, there is heterogeneous pathophysiology, variable disease chronicity, extensive multisystem involvement, and a low event rate relative to acquired heart disease...
June 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28432612/evaluation-of-the-analgesia-nociception-index-ani-in-healthy-awake-volunteers
#14
Rami Issa, Marco Julien, Elizabeth Décary, Olivier Verdonck, Louis-Philippe Fortier, Pierre Drolet, Philippe Richebé
BACKGROUND: Analgesia might be evaluated with simple changes in vital signs, a non-specific and non-sensitive method. Heart rate variability (HRV) correlates with autonomous nervous system activity and can be used to evaluate painful stimuli. Heart rate variability is then transformed into a numeric scale called the analgesia nociception index (ANI), where higher values represent predominant parasympathetic tone, thus low nociception. Under general anesthesia, the ANI decreases following painful stimuli and increases after administration of analgesia, but significant interindividual variability is present...
April 21, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28432103/morphology-and-cardiac-physiology-are-differentially-affected-by-temperature-in-developing-larvae-of-the-marine-fish-mahi-mahi-coryphaena-hippurus
#15
Prescilla Perrichon, Christina Pasparakis, Edward M Mager, John D Stieglitz, Daniel D Benetti, Martin Grosell, Warren W Burggren
Cardiovascular performance is altered by temperature in larval fishes, but how acute vs. chronic temperature exposures independently affect cardiac morphology and physiology in the growing larva is poorly understood. Consequently, the influence of water temperature on cardiac plasticity was investigated in developing mahi-mahi. Morphological (e.g. standard length, heart angle) and physiological cardiac variables (e.g. heart rate fH, stroke volume, cardiac output) were recorded under two conditions by imaging: i) under acute temperature exposure where embryos were reared at 25°C up to 128 hours post-fertilization (hpf) and then acutely exposed to 25° (rearing temperature), 27° and 30°C; ii) at two rearing (chronic) temperatures of 26° and 30°C and performed at 32 and 56 hpf...
April 21, 2017: Biology Open
https://www.readbyqxmd.com/read/28431533/effect-of-a-16-week-bikram-yoga-program-on-heart-rate-variability-and-associated-cardiovascular-disease-risk-factors-in-stressed-and-sedentary-adults-a-randomized-controlled-trial
#16
Zoe L Hewett, Kate L Pumpa, Caroline A Smith, Paul P Fahey, Birinder S Cheema
BACKGROUND: Chronic activation of the stress-response can contribute to cardiovascular disease risk, particularly in sedentary individuals. This study investigated the effect of a Bikram yoga intervention on the high frequency power component of heart rate variability (HRV) and associated cardiovascular disease (CVD) risk factors (i.e. additional domains of HRV, hemodynamic, hematologic, anthropometric and body composition outcome measures) in stressed and sedentary adults. METHODS: Eligible adults were randomized to an experimental group (n = 29) or a no treatment control group (n = 34)...
April 21, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28431171/heritability-of-heart-rate-response-to-arousals-in-twins
#17
Xiaoling Gao, Ali Azarbarzin, Brendan T Keenan, Michele Ostrowski, Frances M Pack, Bethany Staley, Greg Maislin, Allan I Pack, Magdy Younes, Samuel T Kuna
Objectives: To determine if the large and highly reproducible inter-individual differences in arousal intensity and heart rate response to arousal (ΔHR) during non-REM sleep are heritable. Methods: Polysomnograms of 55 monozygotic (14 male and 41 female pairs) and 36 dizygotic (15 male and 21 female pairs) same-sex twin pairs were analyzed. Arousals were scored using the 2012 American Academy of Sleep Medicine criteria. Arousal intensity was scaled (between 0 and 9) using an automatic algorithm based on the change in EEG time and frequency characteristics...
April 18, 2017: Sleep
https://www.readbyqxmd.com/read/28428900/asymptomatic-severe-vagal-and-sympathetic-cardiac-denervation-in-holmes-adie-s-syndrome
#18
B Estañol, R C Callejas-Rojas, S Cortés, R Martínez-Memije, O Infante-Vázquez, G Delgado-García
A 40-year-old woman was found to have bilateral Adie's pupils and generalized muscle stretch areflexia. She did not have orthostatic hypotension but, in an ECG strip in the office, she appeared to have an almost fixed heart rate. We thus studied the heart rate variability (HRV) and the systolic blood pressure variability (SBPV) in supine and standing position and also during rhythmic breathing. We found a decreased HRV in the time domain with very low standard deviation in supine and standing position and during rhythmic breathing...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28428666/linear-short-term-heart-rate-variability-parameters-of-subjects-tobacco-cigarette-smokers-and-subjects-nonsmokers-in-preoperative-period
#19
Meldijana Omerbegovic
BACKGROUND: Variations of heart cycles reflect complex dynamic cardiocirculatory regulatory systems in humans. Exposure to tobacco from cigarettes has been shown to elicit specific alterations of heart rate variability parameters leading to predominance of sympathetic and decreasing parameters of parasympathetic measures of cardiac autonomic nervous system tone. AIM: The aim of the trial was assessing differences of linear parameters of heart rate variability in subjects with habit of consuming of cigarettes tobacco in regard to subjects who are not consumers of tobacco...
February 2017: Medical Archives
https://www.readbyqxmd.com/read/28426886/risk-of-stroke-in-chronic-heart-failure-patients-with-preserved-ejection-fraction-but-without-atrial-fibrillation-analysis-of-the-charm-preserved-and-i-preserve-trials
#20
Azmil H Abdul-Rahim, Ana-Cristina Perez, Rachael L MacIsaac, Pardeep S Jhund, Brian L Claggett, Peter E Carson, Michel Komajda, Robert S McKelvie, Michael R Zile, Karl Swedberg, Salim Yusuf, Marc A Pfeffer, Scott D Solomon, Gregory Y H Lip, Kennedy R Lees, John J V McMurray
Aims: The incidence and predictors of stroke in patients with heart failure and preserved ejection fraction (HF-PEF), but without atrial fibrillation (AF), are unknown. We described the incidence of stroke in HF-PEF patients with and without AF and predictors of stroke in those without AF. Methods and results: We pooled data from the CHARM-Preserved and I-Preserve trials. Using Cox regression, we derived a model for stroke in patients without AF in this cohort and compared its performance with a published model in heart failure patients with reduced ejection fraction (HF-REF)-predictive variables: age, body mass index, New York Heart Association class, history of stroke, and insulin-treated diabetes...
March 7, 2017: European Heart Journal
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