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https://www.readbyqxmd.com/read/28628222/the-value-of-electrocardiography-in-prognosticating-clinical-deterioration-and-mortality-in-acute-pulmonary-embolism-a-systematic-review-and-meta-analysis
#1
REVIEW
Amro Qaddoura, Geneviève C Digby, Conrad Kabali, Piotr Kukla, Zhong-Qun Zhan, Adrian M Baranchuk
The role of electrocardiography (ECG) in prognosticating pulmonary embolism (PE) is increasingly recognized. ECG is quickly interpretable, noninvasive, inexpensive, and available in remote areas. We hypothesized that ECG can provide useful information about PE prognostication. We searched MEDLINE, EMBASE, Google Scholar, Web of Science, abstracts, conference proceedings, and reference lists through February 2017. Eligible studies used ECG to prognosticate for the main outcomes of death and clinical deterioration or escalation of therapy...
June 19, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28626057/abnormal-p-wave-axis-and-ischemic-stroke-the-aric-study-atherosclerosis-risk-in-communities
#2
Ankit Maheshwari, Faye L Norby, Elsayed Z Soliman, Ryan J Koene, Mary R Rooney, Wesley T O'Neal, Alvaro Alonso, Lin Y Chen
BACKGROUND AND PURPOSE: Abnormal P-wave axis (aPWA) has been linked to incident atrial fibrillation and mortality; however, the relationship between aPWA and stroke has not been reported. We hypothesized that aPWA is associated with ischemic stroke independent of atrial fibrillation and other stroke risk factors and tested our hypothesis in the ARIC study (Atherosclerosis Risk In Communities), a community-based prospective cohort study. METHODS: We included 15 102 participants (aged 54...
June 16, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28608915/abc-om-pediatrisk-ekg-tolkning
#3
Caroline Fransson, Stefan Johansson, Cecilia Halvorsen
The ABC of paediatric ECG interpretation In paediatric patients, ECG is used as a tool for investigation of arrhythmias, chest pain, syncope, intoxications and congenital heart abnormalities. Paediatric ECGs differ significantly from adult ECGs, and change gradually during childhood, largely because of the changes that start with the transition of foetal circulation at birth. This evolution is most prominent during the first year of life, but it is not until the late adolescent years that the ECG corresponds to that of adults...
June 9, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28546456/electrocardiographic-predictors-of-heart-failure-with-reduced-versus-preserved-ejection-fraction-the-multi-ethnic-study-of-atherosclerosis
#4
Wesley T O'Neal, Matylda Mazur, Alain G Bertoni, David A Bluemke, Mouaz H Al-Mallah, Joao A C Lima, Dalane Kitzman, Elsayed Z Soliman
BACKGROUND: Several markers detected on the routine 12-lead ECG are associated with future heart failure events. We examined whether these markers are able to separate the risk of heart failure with reduced ejection fraction (HFrEF) from heart failure with preserved ejection fraction (HFpEF). METHODS AND RESULTS: We analyzed data of 6664 participants (53% female; mean age 62±10 years) from MESA (Multi-Ethnic Study of Atherosclerosis) who were free of cardiovascular disease at baseline (2000-2002)...
May 25, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28539979/association-of-metabolic-syndrome-and-electrocardiographic-markers-of-subclinical-cardiovascular-disease
#5
Theodora W Elffers, Renée de Mutsert, Hildo J Lamb, Arie C Maan, Peter W Macfarlane, Ko Willems van Dijk, Frits R Rosendaal, J Wouter Jukema, Stella Trompet
BACKGROUND: The metabolic syndrome (MetS) and its components are well-established risk factors for cardiovascular diseases (CVD). It is inconclusive whether MetS and MetS score are associated with electrocardiographic markers of subclinical CVD, therefore we investigated this in a population without pre-existing CVD. METHODS: We performed a cross-sectional analysis in the Netherlands Epidemiology of Obesity study, a population-based cohort including 6671 participants aged 45-65...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28523642/autosomal-recessive-nonsyndromic-arrhythmogenic-right-ventricular-cardiomyopathy-without-cutaneous-involvements-a-novel-mutation
#6
Mahdieh Soveizi, Bahareh Rabbani, Yousef Rezaei, Sedigheh Saedi, Nasim Najafi, Majid Maleki, Nejat Mahdieh
The arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is a genetic disease frequently associated with desmosomal mutations, mainly attributed to dominant mutations in the Plakophilin-2 (PKP2) gene. Naxos and Carvajal are the syndromic forms of ARVD/C due to recessive mutations. Herein, we report an autosomal recessive form of nonsyndromic ARVD/C caused by a mutation in the PKP2 gene. After examination and implementation of diagnostic modalities, the definite diagnosis of ARVD/C was confirmed by detection of ventricular tachycardia with a left bundle branch configuration and a superior axis, T-wave inversion in right precordial leads (i...
May 19, 2017: Annals of Human Genetics
https://www.readbyqxmd.com/read/28505773/relativistic-laser-hosing-instability-suppression-and-electron-acceleration-in-a-preformed-plasma-channel
#7
T W Huang, C T Zhou, H Zhang, S Z Wu, B Qiao, X T He, S C Ruan
The hosing processes of a relativistic laser pulse, electron acceleration, and betatron radiation in a parabolic plasma channel are investigated in the direct laser acceleration regime. It is shown that the laser hosing instability would result in the generation of a randomly directed off-axis electron beam and radiation source with a large divergence angle. While employing a preformed parabolic plasma channel, the restoring force provided by the plasma channel would correct the perturbed laser wave front and thus suppress the hosing instability...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28444249/quantitative-analysis-of-the-3d-cell-shape-changes-driving-soybean-germination
#8
Nátali Maidl Souza, Alexander T Topham, George W Bassel
Seed germination is central to plant establishment and is the starting point for the majority of world agriculture. This transition from seed to seedling has been extensively studied at an organ level, while few studies have examined the cellular events which underlie it. Reports in the model species Arabidopsis have identified a radicle-derived wave of cell expansion underlying the germination process. Whether this spatiotemporal pattern of cell expansion is specific to this model plant or conserved in other species remains unknown...
March 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28431057/quantitative-analysis-of-pkp2-and-neighbouring-genes-in-a-patient-with-arrhythmogenic-right-ventricular-cardiomyopathy-caused-by-heterozygous-pkp2-deletion
#9
Keiko Sonoda, Seiko Ohno, Sou Otuki, Koichi Kato, Nobue Yagihara, Hiroshi Watanabe, Takeru Makiyama, Tohru Minamino, Minoru Horie
Aims: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease mainly caused by desmosome gene mutations. The genetic culprit, however, remains elusive in ∼50% of ARVC patients. One of the reasons for missing genetic abnormalities is the difficulty in detecting large deletions/duplications, which are called as copy number variation (CNV) by the Sanger sequencing method. This study aimed to identify CNVs in PKP2 and a part of other desmosome genes in ARVC patients. Methods and Results: The study cohort consisted of 71 ARVC probands who were diagnosed as definite or borderline cases based on 2010 Task Force Criteria...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28429460/automated-t-wave-analysis-can-differentiate-acquired-qt-prolongation-from-congenital-long-qt-syndrome
#10
Alan Sugrue, Peter A Noseworthy, Vaclav Kremen, J Martijn Bos, Bo Qiang, Ram K Rohatgi, Yehu Sapir, Zachi I Attia, Peter Brady, Pedro J Caraballo, Samuel J Asirvatham, Paul A Friedman, Michael J Ackerman
BACKGROUND: Prolongation of the QT on the surface electrocardiogram can be due to either genetic or acquired causes. Distinguishing congenital long QT syndrome (LQTS) from acquired QT prolongation has important prognostic and management implications. We aimed to investigate if quantitative T-wave analysis could provide a tool for the physician to differentiate between congenital and acquired QT prolongation. METHODS: Patients were identified through an institution-wide computer-based QT screening system which alerts the physician if the QTc ≥ 500 ms...
April 21, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28357825/the-prevalence-of-electrocardiogram-abnormalities-in-professional-divers
#11
Ali Erdal Gunes, Maide Cimsit
BACKGROUND: The underwater environment presents physiological challenges for the cardiovascular, renal and pulmonary systems. Increases in external hydrostatic pressure reduce the capacity of the venous compartment and cause blood to move toward the lung. The aim of this study was to evaluate retrospectively electrocardiographic (ECG) changes in a cohort of professional divers. METHODS: Between January 2009 and January 2012, 225 randomly selected professional divers, 204 male (91%) and 21 female (9%) attended our clinic for their biannual diving medical assessment...
March 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28345730/electrocardiographic-abnormalities-in-treatment-na%C3%A3-ve-hiv-subjects-in-south-east-nigeria
#12
Innocent Chukwuemeka Okoye, Ernest Ndukaife Anyabolu
BACKGROUND: Cardiac complications of human immunodeficiency virus (HIV) infection are important causes of morbidity and mortality. We set out to determine the electrocardiographic (ECG) abnormalities in treatment-naïve HIV-positive patients in Enugu, south-east Nigeria. METHODS: This was a cross-sectional study involving 250 HIV-positive and 200 HIV-negative subjects. Demographic and anthropometric data, relevant investigations and ECG results were compared between the groups...
March 23, 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28343654/negative-concordant-t-waves-during-paced-ventricular-rhythm-an-honest-enemy-is-better-than-a-false-friend
#13
Irene di Matteo, Pasquale Crea
The ECG diagnosis of myocardial infarction and ischemia in pacemaker patients is often challenging. The three criteria, proposed by Sgarbossa et al. in 1996, useful to suspect myocardial ischaemia in patient with left bundle branch block were demonstrated to be valid also in pacemaker patients. In the last years, concordant negative T waves in patients with ventricular paced rhythm were linked to various expressions of acute myocardial injury. If available, comparison with previous ECG is crucial. Partial persistence of cardiac memory during fusion beats created an anomalous concordance between negative T waves and QRS axis and could induce erroneous suspicions...
March 14, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28297918/energy-partition-scale-by-scale-in-magnetic-archimedes-coriolis-weak-wave-turbulence
#14
A Salhi, F S Baklouti, F Godeferd, T Lehner, C Cambon
Magnetic Archimedes Coriolis (MAC) waves are omnipresent in several geophysical and astrophysical flows such as the solar tachocline. In the present study, we use linear spectral theory (LST) and investigate the energy partition, scale by scale, in MAC weak wave turbulence for a Boussinesq fluid. At the scale k^{-1}, the maximal frequencies of magnetic (Alfvén) waves, gravity (Archimedes) waves, and inertial (Coriolis) waves are, respectively, V_{A}k,N, and f. By using the induction potential scalar, which is a Lagrangian invariant for a diffusionless Boussinesq fluid [Salhi et al...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28279015/anisotropy-in-the-thermal-hysteresis-of-resistivity-and-charge-density-wave-nature-of-single-crystal-srfeo3-%C3%AE-x-ray-absorption-and-photoemission-studies
#15
S H Hsieh, R S Solanki, Y F Wang, Y C Shao, S H Lee, C H Yao, C H Du, H T Wang, J W Chiou, Y Y Chin, H M Tsai, J-L Chen, C W Pao, C-M Cheng, W-C Chen, H J Lin, J F Lee, F C Chou, W F Pong
The local electronic and atomic structures of the high-quality single crystal of SrFeO3-δ (δ~0.19) were studied using temperature-dependent x-ray absorption and valence-band photoemission spectroscopy (VB-PES) to investigate the origin of anisotropic resistivity in the ab-plane and along the c-axis close to the region of thermal hysteresis (near temperature for susceptibility maximum, Tm~78 K). All experiments herein were conducted during warming and cooling processes. The Fe L 3,2-edge X-ray linear dichroism results show that during cooling from room temperature to below the transition temperature, the unoccupied Fe 3d e g states remain in persistently out-of-plane 3d 3z(2)-r(2) orbitals...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28269220/using-multiple-placements-of-accelerometers-to-measure-cardiovascular-pulse-transit-times
#16
Natalie Kurgan Canino, Ruisheng Wang, Charles J Robinson
To measure pulse transit times (PTT) and calculate pulse wave velocities (PWV), tri-axial and uniaxial accelerometers were placed in groups of 2 to 4 over the manubrium, xiphoid process, forehead, wrist and ankle, and/or over the carotid, femoral, and posterior auricular arteries in 11 consented supine subjects. Signals were sampled at 1 kHz and filtered. Radial vectors were calculated from the tri-axial measurements. A 3-lead ECG was simultaneously collected over the same 180 s window, as well as respiratory rate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28262257/t-wave-axis-deviation-and-qrs-t-angle-controversial-indicators-of-incident-coronary-heart-events
#17
REVIEW
Polychronis Dilaveris, Christos-Konstantinos Antoniou, Konstantinos Gatzoulis, Dimitrios Tousoulis
Abnormal orientation of the T-wave axis and increased angle between the QRS complex (depolarization) and the T-wave (repolarization) have long been assumed to provide a global measure of repolarization abnormality, and have been used to assess ventricular repolarization. The ability of the T wave axis deviation and the QRS-T angle to predict incident coronary heart events was examined in several studies. However, conflicting results have led to significant controversy in the literature concerning their purported ability...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28257003/magnetocardiography-measurements-with-sup-4-sup-he-vector-optically-pumped-magnetometers-at-room-temperature
#18
Sophie Morales, Marie-Constance Corsi, William Fourcault, François Bertrand, Gilles Cauffet, Cyril Gobbo, François Alcouffe, François Lenouvel, Matthieu Le Prado, François Berger, Gerald Vanzetto, Etienne Labyt
In this paper, we present a proof of concept study which demonstrates for the first time the possibility to record magnetocardiography (MCG) signals with 4He vector optically-pumped magnetometers (OPM) operated in a gradiometer mode. Resulting from a compromise between sensitivity, size and operability in a clinical environment, the developed magnetometers are based on the parametric resonance of helium in zero magnetic field. Sensors are operated at room-temperature and provide a tri-axis vector measurement of the magnetic field...
March 3, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28248357/radiation-losses-and-dark-mode-at-light-guiding-by-a-linear-chain-of-nanoparticles
#19
Yurii N Barabanenkov, Mikhail Yu Barabanenkov
A new general formula is presented for a collective extinction cross section of a dielectric or a metallic nanoparticle ensemble in terms of incident electric field work on currents excited inside particles. The formula is obtained by identical transformation of the well-known expression for the summing power of electromagnetic field energy losses caused by particle ensemble scattering and absorption. The derived formula is applied to the problem of radiation losses at electromagnetic excitation transfer along a straight chain of particles...
March 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/28227450/using-multiple-placements-of-accelerometers-to-measure-cardiovascular-pulse-transit-times
#20
Natalie Kurgan Canino, Ruisheng Rick Wang, Charles J Robinson, Natalie Kurgan Canino, Ruisheng Wang, Charles J Robinson, Natalie Kurgan Canino, Charles J Robinson, Ruisheng Rick Wang
To measure pulse transit times (PTT) and calculate pulse wave velocities (PWV), tri-axial and uniaxial accelerometers were placed in groups of 2 to 4 over the manubrium, xiphoid process, forehead, wrist and ankle, and/or over the carotid, femoral, and posterior auricular arteries in 11 consented supine subjects. Signals were sampled at 1 kHz and filtered. Radial vectors were calculated from the tri-axial measurements. A 3-lead ECG was simultaneously collected over the same 180 s window, as well as respiratory rate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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