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https://www.readbyqxmd.com/read/28718257/risk-factors-for-heat-related-deaths-during-the-june-2015-heat-wave-in-karachi-pakistan
#1
Syed Ghazanfar Saleem, Tehreem Ansari, Ashraf Shamshad Ali, Sara Fatima, Mariam Hassan Rizvi, Muhammad Abdul Samad
BACKGROUND: Mortality as a consequence of heat related illness is a public health concern. Emergency department (ED) experiences increased patients' flow and decreased survival as a consequence of heat stroke during the episodes of heat wave. The present study was conducted to identify the risk factors for mortality among victims of heat wave (17th - 23rd June), 2015 evaluated in the Emergency Department of The Indus Hospital (TIH), Karachi. METHODS: In this cross-sectional study data was retrospectively collected...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28717584/pulse-wave-analysis-with-diffusing-wave-spectroscopy
#2
Markus Belau, Wolfgang Scheffer, Georg Maret
Hypertension is a major risk factor for cardiovascular disease and thus at the origin of many deaths by e.g. heart attack or stroke. Hypertension is caused by many factors including an increase in arterial stiffness which leads to changes in pulse wave velocity and wave reflections. Those often result in an increased left ventricular load which may result in heart failure as well as an increased pulsatile pressure in the microcirculation l to damage to blood vessels. In order to specifically treat the different causes of hypertension it is desirable to perform a pulse wave analysis as a complement to measurements of systolic and diastolic pressure by brachial cuff sphygmomanometry...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28713284/greater-progression-of-age-related-aortic-stiffening-in-adults-with-poor-trunk-flexibility-a-5-year-longitudinal-study
#3
Yuko Gando, Haruka Murakami, Kenta Yamamoto, Ryoko Kawakami, Harumi Ohno, Susumu S Sawada, Nobuyuki Miyatake, Motohiko Miyachi
Purpose: Having a low level of physical fitness, especially cardiorespiratory fitness, appears to accelerate age-related aortic stiffening. Whereas, some studies have reported that trunk flexibility is a component of physical fitness, it is also negatively associated with arterial stiffening independent of cardiorespiratory fitness in cross-sectional studies. However, no long-term longitudinal study has determined whether poor trunk flexibility accelerates the progression of age-related aortic stiffening. We examined trunk flexibility and aortic stiffness progression in a 5-year longitudinal study...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28706180/serum-uric-acid-and-arterial-function-after-renal-transplantation
#4
Frederic Bauer, Nikolaos Pagonas, Felix S Seibert, Walter Zidek, Richard Viebahn, Nina Babel, Timm H Westhoff
BACKGROUND Hyperuricemia is associated with an increased risk of cardiovascular disease and chronic allograft nephropathy after renal transplantation. It has recently been demonstrated that treatment of asymptomatic hyperuricemia is associated with improved patient and graft survival; although, the underlying mechanisms remain elusive. The present study investigated the association of serum uric acid (SUA) and systemic arterial function after renal transplantation. MATERIAL AND METHODS In a cross-sectional study, arterial function was analyzed in 54 renal transplant recipients by means of pulse wave analysis...
July 14, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28700131/high-intensity-focused-ultrasound-hifu-and-phase-sensitive-optical-coherence-tomography-phs-oct-for-high-resolution-surface-acoustic-wave-saw-elastography
#5
Kanheng Zhou, Nhan Le, Zhihong Huang, Chunhui Li
Elastography has the ability of quantitatively evaluating the mechanical properties of soft tissue, thus is helpful for diagnosis and treatment monitoring for many diseases, e.g. skin diseases. Surface acoustic waves (SAWs) have been proven to be a non-invasive, non-destructive method for accurate characterization of tissue elastic properties. Current surface acoustic wave elastography using high energy laser pulse or mechanical shaker still have some problems. In order to improve SAW elastography in medical application, a new technique was proposed in this paper, which combines high intensity focused ultrasound (HIFU) as a SAWs impulse inducer and PhS-OCT as a SAWs detector...
July 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28699368/impact-of-blood-pressure-lesion-level-and-physical-activity-on-aortic-augmentation-index-in-persons-with-sci
#6
Caitlyn G Katzelnick, Joseph P Weir, Nancy Chiaravalotti, Glenn Wylie, Trevor Dyson-Hudson, William A Bauman, Jill M Wecht
Individuals with chronic spinal cord injury (SCI) are at a heightened risk of cardiovascular disease (CVD) due to autonomic nervous system dysfunction, physical inactivity and increased inflammatory processes. Arterial stiffness (AS) is recognized as an independent risk factor for CVD and, specifically, pulse wave analysis (PWA) has proven to be a useful tool to predict and track structural arterial changes that reflect arteriosclerosis. The augmentation index (AI) can be used to estimate AS and is derived from the amplitude and timing of the blood pressure (BP) wave reflection in a peripheral artery...
July 12, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28698288/impact-of-forward-stroke-volume-response-on-clinical-and-structural-outcomes-after-percutaneous-mitral-valve-repair-with-mitraclip
#7
Shunsuke Kubo, Mamoo Nakamura, Takahiro Shiota, Yuji Itabashi, Yukiko Mizutani, Yoshifumi Nakajima, Krissada Meemook, Asma Hussaini, Moody Makar, Robert J Siegel, Saibal Kar
BACKGROUND: An increase of systolic forward flow was frequently observed after successful MitraClip implantation in patients with significant mitral regurgitation. However, the impact of systolic forward flow improvement on post-MitraClip outcomes remains unknown. METHODS AND RESULTS: Study population included 160 patients who underwent successful MitraClip implantation. The systolic forward flow was noninvasively calculated as the forward stroke volume (FSV) at baseline before the MitraClip procedure and before discharge with pulse-wave Doppler using transthoracic echocardiography...
July 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28693484/active-children-through-individual-vouchers-evaluation-active-protocol-for-a-mixed-method-randomised-control-trial-to-increase-physical-activity-levels-in-teenagers
#8
Michaela James, Danielle Christian, Samantha Scott, Charlotte Todd, Gareth Stratton, Sarah McCoubrey, Julian Halcox, Suzanne Audrey, Elizabeth Ellins, Sinead Brophy
BACKGROUND: Many teenagers are insufficiently active despite the health benefits of physical activity (PA). There is strong evidence to show that inactivity and low fitness levels increase the risk of non-communicable diseases such as coronary heart disease (CHD), type 2 diabetes and breast and colon cancers (Lee et al. Lancet 380:219-29, 2012). A major barrier facing adolescents is accessibility (e.g. cost and lack of local facilities). The ACTIVE project aims to tackle this barrier through a multi-faceted intervention, giving teenagers vouchers to spend on activities of their choice and empowering young people to improve their fitness and PA levels...
July 11, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28692957/passive-wearable-skin-patch-sensor-measures-limb-hemodynamics-based-on-electromagnetic-resonance
#9
Kim Cluff, Ryan A Becker, Balakumar Jayakumar, Kiyun Han, Ernie Condon, Kenneth Dudley, George Szatkowski, Iraklis I Pipinos, Ryan Z Amick, Jeremy Patterson
OBJECTIVE: The objectives of this study were to design and develop an open circuit electromagnetic resonant skin patch sensor, characterize the fluid volume and resonant frequency relationship and investigate the sensor's ability to measure limb hemodynamics and pulse volume waveform features. METHODS: The skin patch was designed from an open circuit electromagnetic resonant sensor comprised of a single baseline trace of copper configured into a square planar spiral which had a self-resonating response when excited by an external radio frequency (RF) sweep...
July 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28692482/prognostic-value-of-brachial-ankle-pulse-wave-velocity-in-patients-with-non-st-elevation-myocardial-infarction
#10
Hyun Woong Park, Min Gyu Kang, Kyehwan Kim, Jin-Sin Koh, Jeong Rang Park, Seok-Jae Hwang, Young-Hoon Jeong, Jong Hwa Ahn, Jeong Yoon Jang, Choong Hwan Kwak, Yongwhi Park, Jin-Yong Hwang
OBJECTIVE: Brachial-ankle pulse wave velocity (baPWV) measurement is a well-established modality for assessing arterial stiffness and predicting cardiovascular events. However, to our knowledge, its usefulness has not been clarified among patients with non-ST-elevation myocardial infarction (NSTEMI). This study assessed the prognostic value of baPWV in patients with NSTEMI. PATIENTS AND METHODS: Patients (n=411, mean age, 63.8±13.5 years, 75.2% men) with NSTEMI who underwent a percutaneous coronary intervention and baPWV measurement were recruited between January 2013 and December 2015...
July 7, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28690044/a-new-mathematical-model-of-wrist-pulse-waveforms-characterizes-patients-with-cardiovascular-disease-a-pilot-study
#11
Dianning He, Lu Wang, Xiaobing Fan, Yang Yao, Ning Geng, Yingxian Sun, Lisheng Xu, Wei Qian
The purpose of this study was to analyze and compare a series of measured radial pulse waves as a function of contact pressure for young and old healthy volunteers, and old patients with cardiovascular disease. The radial pulse waves were detected with a pressure sensor and the contact pressure of the sensor was incremented by 20gf during the signal acquisition. A mathematical model of radial pulse waveform was developed by using two Gaussian functions modulated by radical functions and used to fit the pulse waveforms...
July 6, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28690023/the-tyg-index-as-a-marker-of-subclinical-atherosclerosis-and-arterial-stiffness-in-lean-and-overweight-postmenopausal-women
#12
Irene Lambrinoudaki, Maria Vasiliki Kazani, Eleni Armeni, Georgios Georgiopoulos, Konstantinos Tampakis, Demetrios Rizos, Areti Augoulea, Georgios Kaparos, Andreas Alexandrou, Kimon Stamatelopoulos
BACKGROUND: The present study aims to examine the association of the metabolic syndrome (MS) as well as of the triglyceride-glucose index (TyG-Index), a novel marker of insulin resistance, with subclinical atherosclerosis in a cohort of postmenopausal women, stratified according to their body mass index. METHODS: A total of 473 informed-consenting, non-diabetic postmenopausal women, without overt cardiovascular disease, were included in this study. We aimed to compare the association between structural and functional indices of subclinical atherosclerosis (i...
June 16, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28687808/predictors-of-development-and-progression-of-retinopathy-in-patients-with-type-2-diabetes-importance-of-blood-pressure-parameters
#13
Claudia R L Cardoso, Nathalie C Leite, Eduardo Dib, Gil F Salles
Diabetic retinopathy (DR) is a chronic microvascular complication associated a worse prognosis. We aimed to evaluate the predictors of development/progression of DR in a cohort of 544 high-risk patients with type 2 diabetes who had annual ophthalmologic examinations over a median follow-up of 6 years. Ambulatory blood pressure (BP) monitoring and aortic stiffness by carotid-femoral pulse wave velocity were performed. Multivariate Cox survival analysis examined the independent predictors of development or progression of DR...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28684239/association-of-vascular-function-and-estimated-cardiovascular-risk-in-patients-with-rheumatoid-arthritis
#14
Herwig Pieringer, Erich Pohanka, Rudolf Puchner, Tobias Brummaier
OBJECTIVES: Rheumatoid arthritis (RA) patients should receive cardiovascular (CV) risk assessment. For this purpose CV risk calculators are available. In addition, parameters of vascular function can be measured and used for risk prediction. Aim of the present study was to assess the association of these two concepts. METHODS: 287 RA patients (58.4±12.6 years) and 232 controls (49.9±13.4 years) were included in this cross-sectional study. We calculated 10 year CV risk with SCORE and QRISK2...
July 3, 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28680079/single-block-pulse-on-electro-optic-q-switch-made-of-linbo-3
#15
Jifang Shang, Jun Sun, Qinglian Li, Jinfeng Yang, Ling Zhang, Jingjun Xu
A novel LiNbO3 (lithium niobate, LN) electro-optic (EO) Q-switch that can independently operate in the pulse-on regime without the assistance of a quarter-wave plate (QWP) or analyzer was designed and demonstrated. By theoretical analysis and calculations, the proper orientation of the LN was determined to be θ = 1.7° and φ = ±45°, and the quarter-wave voltage was identical to that of a conventional LN EO Q-switch. Additionally, the possible influences caused by the small angular variation between the wave normal and optic axis were found to be negligible...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28675748/a-preliminary-study-for-the-assessment-of-hypertension-using-static-and-dynamic-ir-thermograms
#16
Jayanthi Thiruvengadam, Anburajan Mariamichael
Structural changes in blood vessels occur due to prolonged hypertension. Early detection of blood pressure (mm Hg) is essential for disease prevention. The aim of this work is to propose a computer-aided diagnostic (CADx) model for the diagnosis of hypertension using variables derived from non-contact static and dynamic thermal imaging in comparison with the pulse wave velocity (PWV)-derived parameters. Static and dynamic infrared (IR) thermograms of selected skin areas of the body from known hypertensive (n=14) and age- and sex-matched normal subjects were captured...
July 4, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28675704/the-metabolic-syndrome-is-associated-with-carotid-atherosclerosis-and-arterial-stiffness-in-asymptomatic-nondiabetic-postmenopausal-women
#17
Irene Lambrinoudaki, Aikaterini Kazani, Eleni Armeni, Demetrios Rizos, Areti Augoulea, Georgios Kaparos, Andreas Alexandrou, Georgios Georgiopoulos, Ioannis Kanakakis, Kimon Stamatelopoulos
The menopause transition is associated with adverse changes in cardiometabolic risk factors. We aimed to examine the association of the metabolic syndrome (MS) and its features with indices of vascular structure and function in a population of asymptomatic postmenopausal women. A total of 473 informed-consenting, nondiabetic postmenopausal women were included in the study. The MS was defined according to the Joint Definition. We evaluated the association between the presence of MS and indices of vascular structure (carotid artery intima-media thickness (IMT); atherosclerotic plaques) and function (flow-mediated dilatation (FMD); pulse wave velocity (PWV))...
July 4, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28674039/aortic-arch-pulse-wave-velocity-assessed-by-magnetic-resonance-imaging-as-a-predictor-of-incident-cardiovascular-events-the-mesa-multi-ethnic-study-of-atherosclerosis
#18
Yoshiaki Ohyama, Bharath Ambale-Venkatesh, Chikara Noda, Jang-Young Kim, Yutaka Tanami, Gisela Teixido-Tura, Atul R Chugh, Alban Redheuil, Chia-Ying Liu, Colin O Wu, W Gregory Hundley, David A Bluemke, Eliseo Guallar, Joao A C Lima
The predictive value of aortic arch pulse wave velocity (PWV) assessed by magnetic resonance imaging for cardiovascular disease (CVD) events has not been fully established. The aim of the present study was to evaluate the association of arch PWV with incident CVD events in MESA (multi-ethnic study of atherosclerosis). Aortic arch PWV was measured using magnetic resonance imaging at baseline in 3527 MESA participants (mean age, 62±10 years at baseline; 47% men) free of overt CVD. Cox regression was used to evaluate the risk of incident CVD (coronary heart disease, stroke, transient ischemic attack, or heart failure) in relation to arch PWV adjusted for age, sex, race, and CVD risk factors...
July 3, 2017: Hypertension
https://www.readbyqxmd.com/read/28670347/low-serum-adiponectin-level-is-associated-with-metabolic-syndrome-and-is-an-independent-marker-of-peripheral-arterial-stiffness-in-hypertensive-patients
#19
Ming-Chun Chen, Chung-Jen Lee, Chiu-Fen Yang, Yu-Chih Chen, Ji-Hung Wang, Bang-Gee Hsu
BACKGROUND: Adiponectin has been implicated in metabolic syndrome (MetS) and arterial stiffness (AS). We aim to determine the relationship between serum adiponectin concentration as well as peripheral AS in hypertensive patients. METHODS: Fasting blood samples were obtained from 101 hypertensive patients. Brachial-ankle pulse wave velocity (baPWV) was measured with an automatic pulse wave analyzer. Serum adiponectin concentrations were determined by using an enzyme immunoassay kit...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28668834/effects-of-pulsed-electromagnetic-fields-on-breast-cancer-cell-line-mcf-7-using-absorption-spectroscopy
#20
Dominic Z Alcantara, Ian Jerry S Soliman, Romeric F Pobre, Raouf N G Naguib
We present an analysis of the effects of pulsed electromagnetic fields (PEMF) with 3.3 MHz carrier frequency and modulated by audio resonant frequencies on the MCF-7 breast cancer cell line in vitro using absorption spectroscopy. This involves a fluorescence dye called PrestoBlue™ Cell Viability Reagent and a spectrophotometry to test the viability of MCF-7 breast cancer cells under different PEMF treatment conditions in terms of the cell absorption values. The DNA molecule of the MCF-7 breast cancer cells has an electric dipole property that renders it sensitive and reactive to applied electromagnetic fields...
July 2017: Anticancer Research
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