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https://www.readbyqxmd.com/read/28823052/sensitivity-analysis-of-ventricular-activation-and-electrocardiogram-in-tailored-models-of-heart-failure-patients
#1
C Sánchez, G D'Ambrosio, F Maffessanti, E G Caiani, F W Prinzen, R Krause, A Auricchio, M Potse
Cardiac resynchronization therapy is not effective in a variable proportion of heart failure patients. An accurate knowledge of each patient's electroanatomical features could be helpful to determine the most appropriate treatment. The goal of this study was to analyze and quantify the sensitivity of left ventricular (LV) activation and the electrocardiogram (ECG) to changes in 39 parameters used to tune realistic anatomical-electrophysiological models of the heart. Electrical activity in the ventricles was simulated using a reaction-diffusion equation...
August 19, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28820477/lora-mobile-to-base-station-channel-characterization-in-the-antarctic
#2
Johnny Gaelens, Patrick Van Torre, Jo Verhaevert, Hendrik Rogier
Antarctic conditions demand that wireless sensor nodes are operational all year round and that they provide a large communication range of several tens of kilometers. LoRa technology operating in sub-GHz frequency bands implements these wireless links with minimal power consumption. The employed chirp spread spectrum modulation provides a large link budget, combined with the excellent radio-wave propagation characteristics in these bands. In this paper, an experimental wireless link from a mobile vehicle which transmits sensor data to a base station is measured and analyzed in terms of signal-to-noise ratio and packet loss...
August 18, 2017: Sensors
https://www.readbyqxmd.com/read/28819303/automated-segmentation-of-light-sheet-fluorescent-imaging-to-characterize-experimental-doxorubicin-induced-cardiac-injury-and-repair
#3
René R Sevag Packard, Kyung In Baek, Tyler Beebe, Nelson Jen, Yichen Ding, Feng Shi, Peng Fei, Bong Jin Kang, Po-Heng Chen, Jonathan Gau, Michael Chen, Jonathan Y Tang, Yu-Huan Shih, Yonghe Ding, Debiao Li, Xiaolei Xu, Tzung K Hsiai
This study sought to develop an automated segmentation approach based on histogram analysis of raw axial images acquired by light-sheet fluorescent imaging (LSFI) to establish rapid reconstruction of the 3-D zebrafish cardiac architecture in response to doxorubicin-induced injury and repair. Input images underwent a 4-step automated image segmentation process consisting of stationary noise removal, histogram equalization, adaptive thresholding, and image fusion followed by 3-D reconstruction. We applied this method to 3-month old zebrafish injected intraperitoneally with doxorubicin followed by LSFI at 3, 30, and 60 days post-injection...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819203/differential-diagnostic-performance-of-acoustic-radiation-force-impulse-imaging-in-small-%C3%A2-20%C3%A2-mm-breast-cancers-is-it-valuable
#4
Si-Da Wang, Lei Wang, Zhi-Xian Li, Kang-Lai Wei, Xin-Hong Liao, Yuan-Yuan Chen, Xue Huang
To evaluate acoustic radiation force impulse (ARFI) inthe differential diagnosis of small (≤20 mm) solid breast lesions and identify the most efficient ARFI parameters. Conventional ultrasonography and ARFIwere performed in 120 patients with 121 small solid breast lesions. The area ratios (ARs) of the lesion on virtual touch tissue compared to B-mode were calculated. The shear wave velocity of the inner (SWVi) and boundary (SWVb) of the lesions and surrounding fatty tissue (SWVf) was measured. The ratio of SWVi to SWVf (SWVrat) was calculated...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818200/relationship-of-alcohol-consumption-to-all-cause-cardiovascular-and-cancer-related-mortality-in-u-s-adults
#5
Bo Xi, Sreenivas P Veeranki, Min Zhao, Chuanwei Ma, Yinkun Yan, Jie Mi
BACKGROUND: Previous studies have revealed inconsistent findings regarding the association of light to moderate alcohol consumption with cardiovascular disease (CVD) and cancer mortality. OBJECTIVES: The aim of this study was to examine the association between alcohol consumption and risk of mortality from all causes, cancer, and CVD in U.S. adults. METHODS: Data were obtained by linking 13 waves of the National Health Interview Surveys (1997 to 2009) to the National Death Index records through December 31, 2011...
August 22, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28813208/substance-use-and-dependence-among-current-reserve-and-former-military-members-cross-sectional-findings-from-the-national-survey-on-drug-use-and-health-2010-2014
#6
Rachel A Hoopsick, Jennifer Fillo, Bonnie M Vest, D Lynn Homish, Gregory G Homish
BACKGROUND: Maladjustment after leaving the military may contribute to poor health outcomes, including increased risk for substance use and dependence. AIMS: We aimed to examine differences in substance use and dependence on the basis of military involvement in a large nationally representative sample. METHODS: Data are from a subset of the 2010-2014 waves of the National Survey on Drug Use and Health (N = 5,608). Our sample included men and women aged 20-49 years who had either separated/retired from the military (n = 4,862) or were a current reserve soldier (n = 746)...
August 16, 2017: Journal of Addictive Diseases
https://www.readbyqxmd.com/read/28810995/chondrocyte-viability-after-a-simulated-blast-exposure
#7
K Aaron Shaw, Peter C Johnson, David Williams, Steven D Zumbrun, Richard Topolski, Craig D Cameron
OBJECTIVES: The effects of blast exposure have gained increasing interest in the military medical community with their continued occurrence on the battlefield. The impact of the direct and indirect energy imparted from blasts to hollow viscera, as well as closed head injuries, have been well studied. However, the injury to articular cartilage has not been investigated, despite previous correlations regarding the development of osteoarthritis. The purpose of this study was to assess the degree of injury to articular chondrocytes after exposure to a simulated blast overpressure wave...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28809953/monitoring-health-and-reproductive-status-of-olms-proteus-anguinus-by-ultrasound
#8
Susanne Holtze, Maja Lukač, Ivan Cizelj, Frank Mutschmann, Claudia Anita Szentiks, Dušan Jelić, Robert Hermes, Frank Göritz, Stanton Braude, Thomas Bernd Hildebrandt
The olm (Proteus anguinus) is a troglomorphic, neotenous amphibian with extraordinary life expectancy and unique adaptations that deserve further investigation. A low reproductive rate and habitat decline render it threatened by extinction. Establishing captive populations for maintenance and artificial breeding may one day become crucial to the species. Longitudinal, in-vivo assessment of inner organs is invaluable to our understanding of reproductive physiology, health, and behavior. Using ultrasound, we measured heart rate and assessed health and reproductive status of 13 captive olms at Zagreb Zoo...
2017: PloS One
https://www.readbyqxmd.com/read/28809769/adverse-experiences-in-childhood-and-sexually-transmitted-infection-risk-from-adolescence-into-adulthood
#9
Stephanie London, Kelly Quinn, Joy D Scheidell, B Christopher Frueh, Maria R Khan
BACKGROUND: Childhood maltreatment, particularly sexual abuse, has been found to be associated with sexual risk behaviors later in life. We aimed to evaluate associations between a broad range of childhood traumas and sexual risk behaviors from adolescence into adulthood. METHODS: Using data from Waves I, III and IV of the National Longitudinal Study of Adolescent to Adult Health (Add Health), we used logistic regression to estimate the unadjusted odds ratio (OR) and adjusted OR (AOR) for associations between 9 childhood traumas and a cumulative trauma score and three sexual risk outcomes (multiple partnerships, sex trade involvement, and sexually transmitted infection [STI]) in adolescence, young adulthood, and adulthood...
September 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28807353/incidence-rates-correlates-and-prognosis-of-electrocardiographic-p-wave-abnormalities-a-nationwide-population-based-study
#10
Arttu O Lehtonen, Ville L Langén, Pauli J Puukka, Mika Kähönen, Markku S Nieminen, Antti M Jula, Teemu J Niiranen
BACKGROUND: Scant data exist on incidence rates, correlates, and prognosis of electrocardiographic P-wave abnormalities in the general population. METHODS: We recorded ECG and measured conventional cardiovascular risk factors in 5667 Finns who were followed up for incident atrial fibrillation (AF). We obtained repeat ECGs from 3089 individuals 11years later. RESULTS: The incidence rates of prolonged P-wave duration, abnormal P terminal force (PTF), left P-wave axis deviation, and right P-wave axis deviation were 16...
July 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28806778/serum-resistin-as-an-independent-marker-of-aortic-stiffness-in-patients-with-coronary-artery-disease
#11
Ji-Hung Wang, Chung-Jen Lee, Chiu-Fen Yang, Yu-Chih Chen, Bang-Gee Hsu
BACKGROUND: Subjects with higher carotid-femoral pulse wave velocity (cfPWV) will be at an increased risk for cardiovascular (CV) events in future. Resistin is an inflammatory mediator and a biomarker of CV diseases. We evaluated the association between serum resistin and aortic stiffness in patients with coronary artery disease (CAD). METHODS: A total of 104 patients with CAD were enrolled in this study. cfPWV was measured using the SphygmoCor system. Patients with cfPWV >10 m/s were defined as the high aortic stiffness group...
2017: PloS One
https://www.readbyqxmd.com/read/28804380/gender-difference-in-the-prevalence-and-socio-demographic-correlates-of-mobility-disability-among-older-adults-in-nigeria
#12
Saliu Adejumobi Balogun, Aravinda Meera Guntupalli
The aim of the current study is to examine gender differences in mobility disability among older people in Nigeria, and to explore factors associated with gender differences in mobility disability in later life. Data were used from the first (2010-2011) wave of the Nigeria General Household Survey-Panel, which included 3586 respondents aged 50 years and above. Mobility disability was assessed as self-reported difficulty in walking 100 m, walking 1 km, walking uphill, running, bending or stooping, and climbing stairs...
September 2016: European Journal of Ageing
https://www.readbyqxmd.com/read/28803927/clinical-implications-of-the-limited-relationship-of-voltage-criteria-for-electrocardiogram-left-ventricular-hypertrophy-to-cardiovascular-mortality
#13
Le Dung Ha, Ayman Elbadawi, Victor F Froelicher
BACKGROUND: Numerous methods have been proposed for diagnosing left ventricular hypertrophy using the electrocardiogram. They have limited sensitivity for recognizing pathological hypertrophy at least in part due to their inability to distinguish pathological from physiological hypertrophy. Our objective is to compare the major electrocardiogram - left ventricular hypertrophy criteria using cardiovascular mortality as a surrogate for pathological hypertrophy. METHODS: This study was a retrospective analysis of 16,253 Veterans less than 56 years of age seen at a large Veteran's Affairs Medical Center from 1987 to 1999 and followed a median of 17...
August 10, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28802985/clinical-analysis-of-48-h-emergency-department-visit-post-outpatient-extracorporeal-shock-wave-lithotripsy-for-urolithiasis
#14
Chin-Heng Lu, Junne-Yih Kuo, Tzu-Ping Lin, Yi-Hsiu Huang, Hsiao-Jen Chung, William J S Huang, Howard H H Wu, Yen-Hwa Chang, Alex T L Lin, Kuang-Kuo Chen
BACKGROUND: Patients suffering from renal or ureteral stones can undergo significant discomfort, even when timely diagnosed and treated. The aim of this study was to assess the risk factors and safety of outpatient Extracorporeal Shock Wave Lithotripsy (ESWL) in the management of patients with renal or ureteral stones. METHODS: In this study, our cohort consisted of 844 outpatients who underwent outpatient ESWL treated between February 2012 and November 2014 at Taipei Veterans General Hospital...
August 9, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28801846/vascular-function-in-breast-cancer-survivors-on-aromatase-inhibitors-a-pilot-study
#15
Anne Blaes, Heather Beckwith, Natalia Florea, Robert Hebbel, Anna Solovey, David Potter, Douglas Yee, Rachel Vogel, Russell Luepker, Daniel Duprez
PURPOSE: Aromatase inhibitors (AI) have been shown to reduce breast cancer-related mortality in women with estrogen positive (ER+) breast cancer. The use of AIs, however, has been associated with higher rates of hypertension, hyperlipidemia, and cardiovascular (CV) events. METHODS: A cross-sectional study of 25 healthy postmenopausal women and 36 women with curative intent breast cancer on an AI was performed to assess endothelial dysfunction, an indicator of risk for CV events...
August 11, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28801548/virtual-cardiac-monolayers-for-electrical-wave-propagation
#16
Nina Kudryashova, Valeriya Tsvelaya, Konstantin Agladze, Alexander Panfilov
The complex structure of cardiac tissue is considered to be one of the main determinants of an arrhythmogenic substrate. This study is aimed at developing the first mathematical model to describe the formation of cardiac tissue, using a joint in silico-in vitro approach. First, we performed experiments under various conditions to carefully characterise the morphology of cardiac tissue in a culture of neonatal rat ventricular cells. We considered two cell types, namely, cardiomyocytes and fibroblasts. Next, we proposed a mathematical model, based on the Glazier-Graner-Hogeweg model, which is widely used in tissue growth studies...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800936/associations-between-dietary-salt-potassium-and-blood-pressure-in%C3%A2-south-african-adults-who-sage-wave-2-salt-tobacco
#17
L J Ware, K Charlton, A E Schutte, M Cockeran, N Naidoo, P Kowal
BACKGROUND & AIMS: In June 2016, South Africa implemented legislation mandating maximum sodium levels in a range of processed foods with a goal of reducing population salt intake and disease burden from hypertension. Our aim was to explore the relationship between salt and blood pressure (BP) in a subsample of the World Health Organization Study on global AGEing and adult health (SAGE) Wave 2 before implementation of legislation in South Africa. METHODS & RESULTS: Blood pressure (BP) was measured in triplicate (n = 2722; median age 56 years; 33% male) and 24-h urine collected in a nested subsample (n = 526) for sodium, potassium and creatinine analysis...
July 8, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28796605/pulse-inversion-subharmonic-ultrafast-active-cavitation-imaging-in-tissue-using-fast-eigenspace-based-adaptive-beamforming-and-cavitation-deconvolution
#18
Chen Bai, Shanshan Xu, Junbo Duan, Bowen Jing, Miao Yang, Mingxi Wan
Pulse-inversion subharmonic (PISH) imaging can display information relating to pure cavitation bubbles while excluding that of tissue. Although plane-wave-based ultrafast active cavitation imaging (UACI) can monitor the transient activities of cavitation bubbles, its resolution and cavitation-to-tissue ratio (CTR) are barely satisfactory but can be significantly improved by introducing eigenspace-based (ESB) adaptive beamforming. PISH and UACI are a natural combination for imaging of pure cavitation activity in tissue; however, it raises two problems: 1) the ESB beamforming is hard to implement in real time due to the enormous amount of computation associated with the covariance matrix inversion and eigendecomposition and 2) the narrowband characteristic of the subharmonic filter will incur a drastic degradation in resolution...
August 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28796021/psychotropics-environmental-temperature-and-hospital-outcomes-in-older-medical-patients
#19
Arduino A Mangoni, Feruza Kholmurodova, Lidia Mayner, Paul Hakendorf, Richard J Woodman
PURPOSE: The authors investigated whether the use of psychotropics and environmental temperature on admission influence hospital length of stay (LOS) and mortality in older medical patients. METHODS: Clinical and demographic characteristics, Charlson Comorbidity Index, use of psychotropic and nonpsychotropic drugs, hospital LOS, and mortality were retrospectively collected in medical patients 65 years and older (n = 382) admitted to a metropolitan teaching hospital during 5 consecutive heat waves (HWs) between 2007 and 2009...
August 8, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28794635/electrophysiological-findings-of-turkish-patients-with-restless-legs-syndrome
#20
Ahmet Özsimsek, Hasan Rifat Koyuncuoglu
We aimed to investigate changes in electrophysiological findings in Turkish patients with restless legs syndrome (RLS), including F-wave latency (FWL), peripheral silent period (PSP), and Hoffmann reflex. The study took place in a university hospital in Turkey and involved 30 newly diagnosed RLS patients and 30 healthy controls who were matched for age and gender. Participant's demographics (age, gender, weight, and height), laboratory findings, and electrophysiological test outcomes were gathered and analyzed...
2017: Neuropsychiatric Disease and Treatment
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