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https://www.readbyqxmd.com/read/29351419/maternal-nutrient-restriction-in-guinea-pigs-as-an-animal-model-for-studying-growth-restricted-offspring-with-post-natal-catch-up-growth
#1
Catherine L Nevin, Evan Formosa, Yohei Maki, Brad Matushewski, Timothy R H Regnault, Bryan S Richardson
We determined the impact of moderate maternal nutrient restriction (MNR) in guinea pigs with fetal growth restriction (FGR) on offspring body and organ weights, hypothesizing that FGR-MNR animals will show catch-up growth, but with organ-specific differences. Guinea pig sows were fed ad libitum (Control) or 70% of the control diet from 4 week`s pre-conception, switching to 90% at mid-pregnancy (MNR). Control newborns >95g (appropriate for gestational age or AGA, N=37) and MNR newborns <85g (FGR, N=37) were monitored until neonatal (~25 days) or adult (~110 days) necropsy...
January 10, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29350622/beyond-hrv-attractor-reconstruction-using-the-entire-cardiovascular-waveform-data-for-novel-feature-extraction
#2
Philip J Aston, Mark I Christie, Ying H Huang, Manasi Nandi
Advances in monitoring technology allow blood pressure waveforms to be collected at sampling frequencies of 250-1000Hz for long time periods. However, much of the raw data are under analysed. Heart rate variability (HRV) methods, in which beat-to-beat interval lengths are extracted and analysed, have been extensively studied, However, this approach discards the majority of the raw data. OBJECTIVE: Our aim is to detect changes in the shape of the waveform in long streams of blood pressure data...
January 19, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29350296/use-of-biotechnological-devices-in-the-quantification-of-psychophysiological-workload-of-professional-chess-players
#3
Juan P Fuentes, Santos Villafaina, Daniel Collado-Mateo, Ricardo de la Vega, Narcis Gusi, Vicente Javier Clemente-Suárez
Psychophysiological requirements of chess players are poorly understood, and periodization of training is often made without any empirical basis. For this reason, the aim of the present study was to investigate the psychophysiological response and quantify the player internal load during, and after playing a chess game. The participant was an elite 33 year-old male chess player ranked among the 300 best chess players in the world. Thus, cortical arousal by critical flicker fusion threshold, electroencephalogram by the theta Fz/alpha Pz ratio and autonomic modulation by heart rate variability were analyzed...
January 19, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29350194/detection-rate-of-fetal-distress-using-contraction-dependent-fetal-heart-rate-variability-analysis
#4
Guy J J Warmerdam, Rik Vullings, Judith O E H Van Laar, M Beatrijs Van der Hout-Van der Jagt, Jan W M Bergmans, Lars Schmitt, S Guid Oei
Monitoring of the fetal condition during labor is currently performed by cardiotocography (CTG). Despite the use of CTG in clinical practice, CTG interpretation suffers from a high inter- and intra-observer variability and a low specificity. In addition to CTG, analysis of fetal heart rate variability (HRV) has been shown to provide information on fetal distress. However, fetal HRV can be strongly influenced by uterine contractions, particularly during the second stage of labor. Therefore, the aim of this study is to examine if distinguishing contractions from rest periods can improve the detection rate of HRV features for fetal distress during the second stage of labor...
January 19, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29349824/reduced-left-ventricular-filling-following-blood-volume-extraction-does-not-result-in-compensatory-augmentation-of-cardiac-mechanics
#5
Rachel Lord, David MacLeod, Keith George, David Oxborough, Rob Shave, Mike Stembridge
An acute non-invasive reduction in preload has been shown to augment cardiac mechanics to maintain stroke volume and cardiac output. Such interventions induce concomitant changes in heart rate (HR), whereas blood volume extraction reduces preload without HR changes. Therefore, the purpose of this study was to determine whether a preload reduction in isolation resulted in augmented stroke volume achieved via enhanced cardiac mechanics. Nine healthy volunteers (4 female, age 29 ± 11 years) underwent echocardiography for the assessment of left ventricular (LV) volumes and mechanics in a supine position at baseline and end-extraction following the controlled removal of 25% of total blood volume (1062 ± 342 ml)...
January 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29348110/the-role-of-ethnicity-and-environment-in-the-regulation-of-response-to-sensory-stimulus-in-children-protocol-and-pilot-findings-of-a-neurophysiological-study
#6
Ivan Neil Gomez, Cynthia Yy Lai, Chetwyn Ch Chan, Hector Wh Tsang
BACKGROUND: The ability to regulate the response to sensory stimuli has been associated with successful behavioral patterns necessary for daily activities. However, it is not known whether a child's ethnicity and environment can influence autonomic regulatory mechanisms. OBJECTIVE: This study aims to explore the role of ethnicity and environment in the regulation of responses to sensory stimuli in children. METHODS: In this study, we intend to recruit 128 children from different ethnic groups or environment contexts as follows: (1) 32 typically developing Chinese children living in Hong Kong; (2) 32 typically developing Filipino children living in Hong Kong; (3) 32 typically developing Filipino children who are living in urban areas; and (4) 32 typically developing Filipino children who are living in rural areas in Philippines...
January 18, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#7
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29343839/musical-auditory-stimulus-acutely-influences-heart-rate-dynamic-responses-to-medication-in-subjects-with-well-controlled-hypertension
#8
Eli Carlos Martiniano, Milana Drumond Ramos Santana, Érico Luiz Damasceno Barros, Maria do Socorro da Silva, David Matthew Garner, Luiz Carlos de Abreu, Vitor E Valenti
Music can improve the efficiency of medical treatment when correctly associated with drug action, reducing risk factors involving deteriorating cardiac function. We evaluated the effect of musical auditory stimulus associated with anti-hypertensive medication on heart rate (HR) autonomic control in hypertensive subjects. We evaluated 37 well-controlled hypertensive patients designated for anti-hypertensive medication. Heart rate variability (HRV) was calculated from the HR monitor recordings of two different, randomly sorted protocols (control and music) on two separate days...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342958/an-enhanced-method-to-estimate-heart-rate-from-seismocardiography-via-ensemble-averaging-of-body-movements-at-six-degrees-of-freedom
#9
Hyunwoo Lee, Hana Lee, Mincheol Whang
Continuous cardiac monitoring has been developed to evaluate cardiac activity outside of clinical environments due to the advancement of novel instruments. Seismocardiography (SCG) is one of the vital components that could develop such a monitoring system. Although SCG has been presented with a lower accuracy, this novel cardiac indicator has been steadily proposed over traditional methods such as electrocardiography (ECG). Thus, it is necessary to develop an enhanced method by combining the significant cardiac indicators...
January 15, 2018: Sensors
https://www.readbyqxmd.com/read/29341873/differences-in-heart-rate-reserve-of-similar-physical-activities-during-work-and-in-leisure-time-a-study-among-danish-blue-collar-workers
#10
Pieter Coenen, Mette Korshøj, David M Hallman, Maaike A Huysmans, Allard J van der Beek, Leon M Straker, Andreas Holtermann
Recent studies suggest that while leisure-time physical activity (LTPA) promotes general health, engaging in occupational physical activity (OPA) may have negative health consequences. It has been hypothesized that the different health effects from OPA and LTPA can be explained by differences in physical activity (PA) intensity in these two domains. To assess the intensity of OPA and LTPA, we aimed to study the percentage heart rate reserve (%HRR) during similar types of OPA and LTPA during workdays. Data from the NOMAD study on Danish blue-collar workers (n=124) with objective measurements of PA (using accelerometers) and heart rate (using heart rate monitors) for 4 workdays were analysed...
January 13, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29340538/autonomic-nervous-system-monitoring-in-intensive-care-as-a-prognostic-tool-systematic-review
#11
Luis Bento, Rui Fonseca-Pinto, Pedro Póvoa
OBJECTIVE: To present a systematic review of the use of autonomic nervous system monitoring as a prognostic tool in intensive care units by assessing heart rate variability. METHODS: Literature review of studies published until July 2016 listed in PubMed/Medline and conducted in intensive care units, on autonomic nervous system monitoring, via analysis of heart rate variability as a prognostic tool (mortality study). The following English terms were entered in the search field: ("autonomic nervous system" OR "heart rate variability") AND ("intensive care" OR "critical care" OR "emergency care" OR "ICU") AND ("prognosis" OR "prognoses" OR "mortality")...
October 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/29339992/effects-of-passive-and-active-rest-on-physiological-responses-and-time-motion-characteristics-in-different-small-sided-soccer-games
#12
Ersan Arslan, Utku Alemdaroglu, Yusuf Koklu, Tahir Hazir, Surhat Muniroglu, Baris Karakoc
The purpose of this study was to investigate the effects of resting regimes on physiological responses and time motion characteristics between bouts during small sided games (SSGs) in young soccer players. Sixteen players (average age 16.87 ± 0.34 years; body height 176.69 ± 3.21 cm; body mass 62.40 ± 2.59 kg; training experience 3.75 ± 0.44 years) performed four bouts 2-a-side, 3-a-side and 4-a-side games with three minutes active (SSGar: Running at 70% of HRmax) and passive (SSGpr) rest between bouts at two-day intervals...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339923/an-acute-bout-of-housework-activities-has-beneficial-effects-on-executive-function
#13
Kenji Tsuchiya, Shinichi Mitsui, Ryuji Fukuyama, Noriki Yamaya, Takaaki Fujita, Kaori Shimoda, Fusae Tozato
Purpose: Although acute bouts of exercise reportedly have beneficial effects on executive function, inactive people may find it difficult to start exercising. In this study, we focused on housework activities (HAs) that generate a sense of accomplishment and require a mild intensity of physical activity. We examined the impact of an acute bout of HA on executive function and oxygenated hemoglobin (oxy-Hb) flow to related cortical regions. Materials and methods: Twenty-five participants (age, 18-21 years; mean, 19...
2018: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29338821/factors-influencing-regional-cerebral-oxygen-saturation-during-one-lung-ventilation-in-thoracic-surgery
#14
Ya Hong Gong, Wei Jia Wang, Wei Wei, Yu Guang Huang
Objective To identify factors influencing regional cerebral oxygen saturation (rScO2) during one-lung ventilation (OLV) in thoracic surgery. Methods Totally 33 patients with an ASA physical status of 1-3 scheduled for elective thoracic surgery with one-lung ventilation under general anesthesia were recruited. After anesthesia was induced with propofol,fentanyl/sufentanil,and rocuronium. All patients received balanced anesthesia using sevoflurane. During OLV,volume-controlled ventilation was used with a tidal volume of 6-7 ml/kg and an inspiration:expiration ratio of 1:1...
December 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/29330874/safety-of-high-current-stimulation-for-intermittent-intraoperative-neural-monitoring-in-thyroid-surgery-a-porcine-model
#15
I-Cheng Lu, Pi-Ying Chang, Gregory W Randolph, Hsiu-Ya Chen, Kuang-Yi Tseng, Yi-Chu Lin, Feng-Yu Chiang, Che-Wei Wu
OBJECTIVES: During monitored thyroidectomy, displacement of the recurrent laryngeal nerve (RLN) or vagus nerve (VN) in some complicated cases can increase the risk of injury. Although increasing the stimulus current can facilitate nerve mapping and localization, the safety of a high-current stimulus remains unknown. Therefore, this study evaluated the safety of a high-current stimulus in a porcine model. METHODS: Short-duration (1 minute), high-current (3, 5, 10, 15, 20, 25, and 30 mA at 4Hz) stimulus pulses were repeatedly applied to the RLN or VN in six anesthetized piglets...
January 13, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29330639/changes-in-tissue-and-cerebral-oxygenation-following-spinal-anesthesia-in-infants-a-prospective-study
#16
Alexander B Froyshteter, Dmitry Tumin, Emmett E Whitaker, David P Martin, Mumin Hakim, Hina Walia, Tarun Bhalla, Joseph D Tobias
Use of spinal anesthesia (SA) in children may address concerns about potential neurocognitive effects of general anesthesia. We used near-infrared spectroscopy (NIRS) to assess the effects of SA on cerebral and tissue oxygenation in 19 patients aged 7 ± 3 months. Prior to SA placement, NIRS monitors were placed on the forehead (cerebral) and the thigh (tissue). Intraoperative cerebral and tissue saturation were 73 ± 7 and 80 ± 11%, respectively, before SA placement. NIRS measurements were monitored every minute for 30 min after SA placement and modeled using mixed-effects linear regression...
January 12, 2018: Journal of Anesthesia
https://www.readbyqxmd.com/read/29330222/increased-sympathovagal-imbalance-evaluated-by-heart-rate-variability-is-associated-with-decreased-cardiac-t2-and-lv-function-in-transfusion-dependent-thalassemia-patients
#17
Sintip Pattanakuhar, Arintaya Phrommintikul, Adisak Tantiworawit, Sasikarn Konginn, Somdet Srichairattanakool, Siriporn C Chattipakorn, Nipon Chattipakorn
Early detection of iron overload cardiomyopathy is an important strategy in decreasing the mortality rate of patients with transfusion dependent thalassemia (TDT).  Although cardiac magnetic resonance (CMR) T2* is effective in detecting cardiac iron deposition, it is costly and not generally available.  We investigated whether heart rate variability (HRV) can be used as a screening method of iron overload cardiomyopathy in TDT patients.  HRV, evaluated by 24-hour Holter monitoring, non-transferrin bound iron (NTBI), serum ferritin, left ventricular ejection fraction (LVEF), and CMR-T2* were determined...
January 12, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29328360/metabolic-side-effects-in-patients-using-atypical-antipsychotic-medications-during-hospitalization
#18
Gül Dikeç, Leyla Baysan Arabaci, Gülçin Bölük Uzunoglu, Selin Demet Mizrak
The current research evaluated metabolic side effects in inpatients (N = 271) using atypical antipsychotic medications in a psychiatric hospital in Turkey between June and December 2016. Data were collected via an information form created after reviewing the literature at the time of patients' hospitalization and discharge. According to the analysis, 73.8% of patients stated they experienced side effects from antipsychotic medications and 20.7% of patients experienced weight gain. A statistical difference was detected among body mass index, waist circumference, diastolic blood pressure, and heart rate during patient hospitalization and discharge...
January 11, 2018: Journal of Psychosocial Nursing and Mental Health Services
https://www.readbyqxmd.com/read/29327893/heart-failure-in-grown-up-congenital-heart-disease
#19
Alessia Faccini, Angelo Micheletti, Diana G Negura, Luca Giugno, Gianfranco Butera, Mario Carminati, Alessandro Giamberti, Massimo Chessa
The increasing survival in the adulthood of patients with congenital heart disease (CHD) has changed the epidemiology of adult CHD (ACHD) patients and has led to an increment in hospitalization rates due to heart failure (HF). ACHD patients hospitalized for HF have a five-fold higher risk of death HF than those compensated. HF occurs predominantly in patients with tetralogy of Fallot, single ventricles, and after the Mustard operation for transposition of the great arteries. Diagnostic strategies applied in acquired HF patients are usually used to evaluate ACHD patients, but sometimes this can postpone the identification of HF that can become manifest with unusual and peculiar signs or symptoms...
January 10, 2018: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/29324640/heart-rate-variability-frequency-domain-alterations-among-healthy-nurses-exposed-to-prolonged-work-stress
#20
Rossana Borchini, Giovanni Veronesi, Matteo Bonzini, Francesco Gianfagna, Oriana Dashi, Marco Mario Ferrario
The deregulation of the autonomic nervous system assessed through the heart rate variability (HRV) analysis is a promising pathway linking work stress and cardiovascular diseases. We aim to investigate the associations between HRV High Frequency (HF) and Low Frequency (LF) powers and work stress in a sample of 36 healthy nurses. Perceived work stress was assessed twice one year apart, using the Job Content and Effort Reward Imbalance questionnaires. This allows to classify nurses in three exposure groups: "prolonged high stress" (PHS), "recent high stress" (RHS) and "stable low stress" (SLS)...
January 11, 2018: International Journal of Environmental Research and Public Health
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