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Blood pressure variability

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https://www.readbyqxmd.com/read/27913367/a-new-method-for-self-estimation-of-the-severity-of-obstructive-sleep-apnea-using-easily-available-measurements-and-neural-fuzzy-evaluation-system
#1
Ming-Feng Wu, Wei-Chang Huang, Chia-Feng Juang, Kai-Ming Chang, Chih-Yu Wen, Yu-Hsuan Chen, Ching-Yi Lin, Yi-Chan Chen, Ching-Cheng Lin
This paper proposes a neural fuzzy evaluation system (NFES) with significant variables selected from stepwise regression to predict apnea-hypopnea index (AHI) for evaluating obstructive sleep apnea (OSA). The variables considered are the change statuses of blood pressure (BP) before going to sleep and early in the morning as well as other five easily available measurements (age, body mass index (BMI) etc.) so that users can use the system for self-evaluation of OSA. A total of 150 subjects are reviewed retrospectively and categorized as training (120 subjects) and validation (30 subjects) sets by a five-fold cross validation scheme with stratified sampling based on the OSA severity...
December 1, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27912924/obesity-as-a-mediator-between-cardiorespiratory-fitness-and-blood-pressure-in-preschoolers
#2
Diana P Pozuelo-Carrascosa, Mairena Sánchez-López, Iván Cavero-Redondo, Ana Torres-Costoso, Alberto Bermejo-Cantarero, Vicente Martínez-Vizcaíno
OBJECTIVES: To analyze the relationships between body mass index (BMI), cardiorespiratory fitness (CRF), and blood pressure (BP), and to examine whether obesity acts as a mediator between fitness and BP in children. STUDY DESIGN: A cross-sectional analysis using a population-based sample of 1604 school children aged 4-7 years attending 21 schools from the provinces of Ciudad Real and Cuenca, Spain, was undertaken. Data on anthropometric variables, BP measurements, and CRF were collected...
November 29, 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/27911951/body-surface-area-and-baseline-blood-pressure-predict-subclinical-anthracycline-cardiotoxicity-in-women-treated-for-early-breast-cancer
#3
Paul Kotwinski, Gillian Smith, Jackie Cooper, Julie Sanders, Louise Ma, Albert Teis, David Kotwinski, Michael Mythen, Dudley J Pennell, Alison Jones, Hugh Montgomery
BACKGROUND AND AIMS: Anthracyclines are highly effective chemotherapeutic agents which may cause long-term cardiac damage (chronic anthracycline cardiotoxicity) and heart failure. The pathogenesis of anthracycline cardiotoxicity remains incompletely understood and individual susceptibility difficult to predict. We sought clinical features which might contribute to improved risk assessment. METHODS: Subjects were women with early breast cancer, free of pre-existing cardiac disease...
2016: PloS One
https://www.readbyqxmd.com/read/27909038/decision-tree-based-modelling-for-identification-of-potential-interactions-between-type-2-diabetes-risk-factors-a-decade-follow-up-in-a-middle-east-prospective-cohort-study
#4
Azra Ramezankhani, Esmaeil Hadavandi, Omid Pournik, Jamal Shahrabi, Fereidoun Azizi, Farzad Hadaegh
OBJECTIVE: The current study was undertaken for use of the decision tree (DT) method for development of different prediction models for incidence of type 2 diabetes (T2D) and for exploring interactions between predictor variables in those models. DESIGN: Prospective cohort study. SETTING: Tehran Lipid and Glucose Study (TLGS). METHODS: A total of 6647 participants (43.4% men) aged >20 years, without T2D at baselines ((1999-2001) and (2002-2005)), were followed until 2012...
December 1, 2016: BMJ Open
https://www.readbyqxmd.com/read/27908703/simultaneous-effects-of-coagulation-and-variable-magnetic-field-on-peristaltically-induced-motion-of-jeffrey-nanofluid-containing-gyrotactic-microorganism
#5
M M Bhatti, A Zeeshan, R Ellahi
In this article, simultaneous effects of coagulation (blood clot) and variable magnetic field on peristaltically induced motion of non-Newtonian Jeffrey nanofluid containing gyrotactic microorganism through an annulus have been studied. The effects of an endoscope also taken into consideration in our study as a special case. The governing flow problem is simplified by taking the approximation of long wavelength and creeping flow regime. The resulting highly coupled differential equations are solved analytically with the help of perturbation method and series solution have been presented up to second order approximation...
November 28, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27906836/visit-to-visit-blood-pressure-variability-is-a-risk-factor-for-all-cause-mortality-and-cardiovascular-disease-a-systematic-review-and-meta-analysis
#6
Jianqi Wang, Xubo Shi, Changsheng Ma, Hua Zheng, Jie Xiao, Hong Bian, Zhimin Ma, Ling Gong
OBJECTIVE: Clinical cohort studies have reported that visit-to-visit variability (VVV) of blood pressure (BP) is associated with cardiovascular disease (CVD) or mortality. However, the results were not consistent in all studies. The current study is, therefore, aimed to conduct a systematic review and meta-analysis to determine the association between VVV of BP and CVD and all-cause mortality. METHOD: PubMed and EMBASE were searched through 18 May 2014, using the following terms: VVV, BP, CVD, coronary heart disease (CHD), myocardial ischemia, stroke, and mortality...
January 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27906477/blood-pressure-measurements-in-780-apparently-healthy-cats
#7
J R Payne, D C Brodbelt, V Luis Fuentes
BACKGROUND: Mean systolic blood pressure in apparently healthy cats has been reported as approximately 125 mmHg using direct assessment, but there is greater variability in reported values using indirect assessment. Increasing age and the white-coat effect are associated with increased systolic blood pressure. HYPOTHESIS/OBJECTIVES: To report Doppler-derived blood pressure measurements from a large population of apparently healthy cats and to assess epidemiologic factors associated with recorded blood pressures...
December 1, 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27905949/burden-of-cumulative-risk-factors-associated-with-non-communicable-diseases-among-adults-in-uganda-evidence-from-a-national-baseline-survey
#8
Ronald Wesonga, David Guwatudde, Silver K Bahendeka, Gerald Mutungi, Fabian Nabugoomu, James Muwonge
BACKGROUND: Modification of known risk factors has been the most tested strategy for dealing with non-communicable diseases (NCDs). The cumulative number of NCD risk factors exhibited by an individual depicts a disease burden. However, understanding the risk factors associated with increased NCD burden has been constrained by scarcity of nationally representative data, especially in the developing countries and not well explored in the developed countries as well. METHODS: Assessment of key risk factors for NCDs using population data drawn from 3987 participants in a nationally representative baseline survey in Uganda was made...
December 1, 2016: International Journal for Equity in Health
https://www.readbyqxmd.com/read/27903511/cardiac-remodeling-and-increased-central-venous-pressure-underlie-elevated-stroke-volume-and-cardiac-output-of-seawater-acclimated-rainbow-trout
#9
Jeroen Brijs, Erik Sandblom, Esmée Dekens, Joacim Näslund, Andreas Ekström, Michael Axelsson
Substantial increases in cardiac output (CO), stroke volume (SV) and gastrointestinal blood flow are essential for euryhaline rainbow trout (Oncorhyncus mykiss) osmoregulating in seawater. However, the underlying hemodynamic mechanisms responsible for these changes are unknown. By examining a range of circulatory and cardiac morphological variables of seawater- and freshwater-acclimated rainbow trout, the present study revealed a significantly higher central venous pressure (CVP) in seawater-acclimated trout (~0...
November 30, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27900417/definition-of-hemodynamic-stability-in-blunt-trauma-patients-a-systematic-review-and-assessment-amongst-dutch-trauma-team-members
#10
S A I Loggers, T W A Koedam, G F Giannakopoulos, E Vandewalle, M Erwteman, W P Zuidema
INTRODUCTION: Trauma is a great contributor to mortality worldwide. One of the challenges in trauma care is early identification and management of bleeding. The circulatory status of blunt trauma patients in the emergency room is evaluated using hemodynamic (HD) parameters. However, there is no consensus on which parameters to use. In this study, we evaluate the used terms and definitions in the literature for HD stability and compare those to the opinion of Dutch trauma team members...
November 30, 2016: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/27900333/the-effects-of-hemodynamic-changes-on-pulse-wave-velocity-in-cardiothoracic-surgical-patients
#11
Yurie Obata, Maki Mizogami, Sarabdeep Singh, Daniel Nyhan, Dan E Berkowitz, Jochen Steppan, Viachaslau Barodka
The effect of blood pressure on pulse wave velocity (PWV) is well established. However, PWV variability with acute hemodynamic changes has not been examined in the clinical setting. The aim of the present study is to investigate the effect of hemodynamic changes on PWV in patients who undergo cardiothoracic surgery. Using data from 25 patients, we determined blood pressure (BP), heart rate (HR), and the left ventricular outflow tract (LVOT) velocity-time integral. By superimposing the radial arterial waveform on the continuous wave Doppler waveform of the LVOT, obtained by transesophageal echo, we were able to determine pulse transit time and to calculate PWV, stroke volume (SV), cardiac output (CO), and systemic vascular resistance (SVR)...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27900172/comparative-effects-of-three-48-week-community-based-physical-activity-and-exercise-interventions-on-aerobic-capacity-total-cholesterol-and-mean-arterial-blood-pressure
#12
Steven Mann, Alfonso Jimenez, Sarah Domone, Chris Beedie
AIM: Insufficient research examines the treatment effectiveness of real-world physical activity (PA) interventions. PURPOSE: We investigated the effects of 3 interventions on directly measured cardiovascular variables. All treatments and measures were administered in community settings by fitness centre staff. METHODS: Participants were sedentary individuals receiving no medication to reduce cardiovascular disease (CVD) risk (n=369, age 43 ±5 years)...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27900071/association-between-leukocyte-mitochondrial-dna-copy-number-and-regular-exercise-in-postmenopausal-women
#13
Yu Kyung Chang, Da Eun Kim, Soo Hyun Cho, Jung-Ha Kim
BACKGROUND: Previous studies suggest that habitual exercise can improve skeletal mitochondrial function; however, to date, the association between exercise and mitochondrial function in peripheral leukocytes has not been reported. The aim of this study was to evaluate the relationship between regular exercise and mitochondrial function by measuring leukocyte mitochondrial DNA (mtDNA) copy number in postmenopausal women. METHODS: This cross-sectional study included 144 relatively healthy, non-diabetic, non-smoking, postmenopausal women...
November 2016: Korean Journal of Family Medicine
https://www.readbyqxmd.com/read/27899498/association-of-visit-to-visit-variability-of-systolic-blood-pressure-with-cardiovascular-disease-and-mortality-in-primary-care-chinese-patients-with-type-2-diabetes-mellitus-a-retrospective-population-based-cohort-study
#14
Eric Yuk Fai Wan, Colman Siu Cheung Fung, Esther Yee Tak Yu, Daniel Yee Tak Fong, Julie Yun Chen, Cindy Lo Kuen Lam
OBJECTIVE: This study aimed to evaluate the impact of visit-to-visit variability (VVV) of systolic blood pressure (SBP) on cardiovascular disease (CVD) and mortality among primary care Chinese patients with type 2 diabetes mellitus (T2DM). RESEARCH DESIGN AND METHODS: A retrospective cohort study was conducted in 124,105 Chinese adult primary care patients with T2DM and without prior diagnosed CVD from August 2008 to December 2009. The VVV of SBP was evaluated using SDs of SBP over 24 months...
November 29, 2016: Diabetes Care
https://www.readbyqxmd.com/read/27898867/angus-calves-born-and-raised-at-high-altitude-adapt-to-hypobaric-hypoxia-by-increasing-alveolar-ventilation-rate-but-not-hematocrit
#15
A K Gulick, F B Garry, T N Holt, K Retallick-Trennepohl, R M Enns, M G Thomas, J M Neary
The objective of this study was to evaluate the effect of altitude on arterial blood-gases and hematocrit in Angus-based calves. It was hypothesized that alveolar ventilation rate, as indicated by arterial pCO, would increase with altitude but hematocrit would not. Five Angus-based herds ( = 30 to 80 per cohort) located at 105 m, 1,470 m, 2,010 m, 2,170 m, and 2,730 m above sea level were enrolled in this prospective cohort study. A portable analyzer measured blood-gas tensions in coccygeal arterial blood. Calves at 1,470 m, 2,170 m, and 2,730 m were sampled twice, at approximately 4 mo and 7 mo of age...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898437/how-best-to-set-the-ventilator-on-extracorporeal-membrane-lung-oxygenation
#16
Luciano Gattinoni, Tommaso Tonetti, Michael Quintel
PURPOSE OF REVIEW: Extracorporeal respiratory support in patients with acute respiratory distress syndrome is applied either as rescue maneuver for life-threatening hypoxemia or as a tool to reduce the harm of mechanical ventilation. Depending on the blood and gas flow, extracorporeal support may completely substitute the natural lung as a gas exchanger (high-flow venovenous bypass) or reduce the need for mechanical ventilation, enabling the removal of a fraction of the metabolically produced CO2...
November 24, 2016: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/27898293/metabolic-syndrome-among-adults-in-china-the-2010-china-noncommunicable-disease-surveillance
#17
Jieli Lu, Limin Wang, Mian Li, Yu Xu, Yong Jiang, Weiqing Wang, Jianhong Li, Shengquan Mi, Mei Zhang, Yichong Li, Tiange Wang, Min Xu, Zhiyun Zhao, Meng Dai, Shenghan Lai, Wenhua Zhao, Linhong Wang, Yufang Bi, Guang Ning
CONTEXT: In China, data on the prevalence of metabolic syndrome have been rare recently. OBJECTIVE: The objective of the study was to evaluate the prevalence of metabolic syndrome and its components in 2010. DESIGN, SETTING AND PARTICIPANTS: The study covered all 31 provinces of mainland China and consisted of a nationally representative population sample of 98,658 Chinese adults aged ≥ 18 years. Of these, 97,098 participants were eligible for the data analysis reported here...
November 29, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27895475/transcranial-direct-current-stimulation-improves-the-qt-variability-index-and-autonomic-cardiac-control-in-healthy-subjects-older-than-60-years
#18
Gianfranco Piccirillo, Cristina Ottaviani, Claudia Fiorucci, Nicola Petrocchi, Federica Moscucci, Claudia Di Iorio, Fabiola Mastropietri, Ilaria Parrotta, Matteo Pascucci, Damiano Magrì
BACKGROUND: Noninvasive brain stimulation technique is an interesting tool to investigate the causal relation between cortical functioning and autonomic nervous system (ANS) responses. OBJECTIVE: The objective of this report is to evaluate whether anodal transcranial direct current stimulation (tDCS) over the temporal cortex influences short-period temporal ventricular repolarization dispersion and cardiovascular ANS control in elderly subjects. SUBJECTS AND METHODS: In 50 healthy subjects (29 subjects younger than 60 years and 21 subjects older than 60 years) matched for gender, short-period RR and systolic blood pressure spectral variability, QT variability index (QTVI), and noninvasive hemodynamic data were obtained during anodal tDCS or sham stimulation...
2016: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/27894602/evolution-and-degree-of-control-of-cardiovascular-risk-factors-after-5-years-of-follow-up-and-their-relationship-with-the-incidence-of-peripheral-arterial-disease-artper-cohort
#19
Rosa Forés, María Teresa Alzamora, Guillem Pera, Marta Valverde, Maria Angla, José Miguel Baena-Díez, Xavier Mundet-Tuduri
BACKGROUND AND OBJECTIVE: Although cardiovascular risk factors (CVRF) are well known, their degree of control is not optimal. The aim of this study is to assess the evolution and control of CVRFs after 5 years of monitoring a population-based cohort and their association with the incidence of peripheral arterial disease (PAD). MATERIAL AND METHOD: Prospective cohort study recruited between 2006-2008. Second phase between 2011-2012. An ankle brachial index was determined for all participants in both phases...
November 25, 2016: Medicina Clínica
https://www.readbyqxmd.com/read/27892886/safety-profile-and-utility-of-treadmill-exercise-in-patients-with-high-gradient-hypertrophic-cardiomyopathy
#20
Lars Lindholm Sorensen, Hsin-Yueh Liang, Aurelio Pinheiro, Alex Hilser, Veronica Dimaano, Niels Thue Olsen, Thomas Fritz Hansen, Peter Sogaard, Alexandra Nowbar, Chiara Pisanello, Iraklis Pozios, Susan Phillip, Xun Zhou, Roselle Abraham, Theodore P Abraham
: Exercise echocardiography in the evaluation of hypertrophic cardiomyopathy (HCM) provides valuable information for risk stratification, selection of optimal treatment, and prognostication. However, HCM patients with left ventricular outflow tract gradients ≥30mm Hg are often excluded from exercise testing because of safety considerations. We examined the safety and utility of exercise testing in patients with high-gradient HCM. METHODS: We evaluated clinical characteristics, hemodynamics, and imaging variables in 499 consecutive patients with HCM who performed 959 exercise tests...
October 20, 2016: American Heart Journal
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