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ECG Response

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https://www.readbyqxmd.com/read/29454649/relationship-between-vectorcardiographic-qrs-area-myocardial-scar-quantification-and-response-to-cardiac-resynchronization-therapy
#1
Uyên Châu Nguyên, Simon Claridge, Kevin Vernooy, Elien B Engels, Reza Razavi, Christopher A Rinaldi, Zhong Chen, Frits W Prinzen
PURPOSE: To investigate the relationship between vectorcardiography (VCG) and myocardial scar on cardiac magnetic resonance (CMR) imaging, and whether combining these metrics may improve cardiac resynchronization therapy (CRT) response prediction. METHODS: Thirty-three CRT patients were included. QRSarea , Tarea and QRSTarea were derived from the ECG-synthesized VCG. CMR parameters reflecting focal scar core (Scar2SD , Gray2SD ) and diffuse fibrosis (pre-T1, extracellular volume [ECV]) were assessed...
February 8, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29453408/biosignals-reflect-pair-dynamics-in-collaborative-work-eda-and-ecg-study-of-pair-programming-in-a-classroom-environment
#2
Lauri Ahonen, Benjamin Ultan Cowley, Arto Hellas, Kai Puolamäki
Collaboration is a complex phenomenon, where intersubjective dynamics can greatly affect the productive outcome. Evaluation of collaboration is thus of great interest, and can potentially help achieve better outcomes and performance. However, quantitative measurement of collaboration is difficult, because much of the interaction occurs in the intersubjective space between collaborators. Manual observation and/or self-reports are subjective, laborious, and have a poor temporal resolution. The problem is compounded in natural settings where task-activity and response-compliance cannot be controlled...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29438471/severity-of-chagasic-cardiomyopathy-is-associated-with-response-to-a-novel-rapid-diagnostic-test-for-trypanosoma-cruzi-tcii-v-vi
#3
Tapan Bhattacharyya, Louisa A Messenger, Caryn Bern, Pascal Mertens, Quentin Gilleman, Nicolas Zeippen, Bruno C Bremer Hinckel, Niamh Murphy, Robert H Gilman, Michael A Miles
Background: Trypanosoma cruzi causes Chagas disease in the Americas. Outcome of infection ranges from lifelong asymptomatic status to severe disease. Understanding how history of T. cruzi lineage (TcI-TcVI) infection relates to clinical prognosis is challenging. We previously described peptide-based lineage-specific ELISA with Trypomastigote Small Surface Antigen (TSSA). Methods: A novel rapid diagnostic test (Chagas Sero K-SeT) incorporating a peptide corresponding to the TSSA-II/V/VI common epitope was developed, and validated by comparison with ELISA...
February 9, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29437733/cough-as-the-sole-manifestation-of-pericardial-effusion
#4
Hee Kong Fong, Obai Abdullah, Sandeep Gautam
A 59-year-old woman with paroxysmal atrial fibrillation (AF) presented with severe non-productive cough, malaise, low-grade fever and AF flare-up 3 weeks following pulmonary vein isolation with radiofrequency catheter ablation. She denied chest pain or dyspnoea. Patient was haemodynamically stable. There was no pulsus paradoxus. Laboratories showed leucocytosis and elevated C-reactive protein. ECG showed sinus tachycardia. CT abdomen and pelvis showed a large pericardial effusion (PE). Shortly after admission, she developed AF with rapid ventricular response, responsive to intravenous amiodarone...
February 5, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29433839/an-accurate-emotion-recognition-system-using-ecg-and-gsr-signals-and-matching-pursuit-method
#5
Atefeh Goshvarpour, Ataollah Abbasi, Ateke Goshvarpour
BACKGROUND: The purpose of the current study was to examine the effectiveness of Matching Pursuit (MP) algorithm in emotion recognition. METHODS: Electrocardiogram (ECG) and galvanic skin responses (GSR) of 11 healthy students were collected while subjects were listening to emotional music clips. Applying three dictionaries, including two wavelet packet dictionaries (Coiflet, and Daubechies) and discrete cosine transform, MP coefficients were extracted from ECG and GSR signals...
December 2017: Biomedical Journal
https://www.readbyqxmd.com/read/29433478/case-report-of-severe-myocarditis-in-an-immunocompromised-child-with-respiratory-syncytial-virus-infection
#6
Hiroki Miura, Fumihiko Hattori, Hidetoshi Uchida, Tadayoshi Hata, Kazuko Kudo, Masatoki Sato, Tetsushi Yoshikawa
BACKGROUND: Respiratory syncytial virus (RSV) infection is common and may be severe among patients with preexisting cardiac anomalies, but direct involvement of myocardial damage is not common in those patients. Additionally, myocardial involvement has been rarely described among immune compromised children. CASE PRESENTATION: A 4-year-old girl with acute lymphoblastic leukemia who received maintenance chemotherapy in an outpatient clinic developed systemic inflammatory response syndrome...
February 12, 2018: BMC Pediatrics
https://www.readbyqxmd.com/read/29428463/cardiac-repolarization-evolves-differently-during-the-course-of-benign-and-disabling-multiple-sclerosis
#7
Alma Mikkola, Aku Ojanen, Juha Ek Hartikainen, Anne M Remes, Sakari Simula
BACKGROUND: Cardiac repolarization is modulated by the autonomic nervous system. Even though multiple sclerosis associates with prolonged cardiac repolarization the physiology responsible for the phenomenon remains unknown. OBJECTIVE: To study in longitudinal setting whether the patients with confirmed benign and disabling outcome of relapsing-remitting multiple sclerosis (RRMS) differ in regard to changes of cardiac repolarization. METHODS: Total of 43 patients, 26% with benign (EDSS ≤2 at least 10y after onset symptom) and 74% with disabling (EDSS >2 at least 10y after onset symptom) RRMS, having 12-lead electrocardiogram (ECG) recorded at the time of onset symptom (ECG1) and for follow-up (ECG2), were studied...
February 1, 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29425608/response-to-ecg-january-2018
#8
Pasquale Crea, Emmanuele Soraci, Raffaella Mallamace
No abstract text is available yet for this article.
February 2018: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29414535/unsupervised-heart-rate-estimation-in-wearables-with-liquid-states-and-a-probabilistic-readout
#9
Anup Das, Paruthi Pradhapan, Willemijn Groenendaal, Prathyusha Adiraju, Raj Thilak Rajan, Francky Catthoor, Siebren Schaafsma, Jeffrey L Krichmar, Nikil Dutt, Chris Van Hoof
Heart-rate estimation is a fundamental feature of modern wearable devices. In this paper we propose a machine learning technique to estimate heart-rate from electrocardiogram (ECG) data collected using wearable devices. The novelty of our approach lies in (1) encoding spatio-temporal properties of ECG signals directly into spike train and using this to excite recurrently connected spiking neurons in a Liquid State Machine computation model; (2) a novel learning algorithm; and (3) an intelligently designed unsupervised readout based on Fuzzy c-Means clustering of spike responses from a subset of neurons (Liquid states), selected using particle swarm optimization...
January 12, 2018: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29413668/qtc-prolongation-increased-nt-probnp-and-pre-clinical-myocardial-wall-remodeling-in-excessive-alcohol-consumers-the-sabpa-study
#10
Annemarie Wentzel, Leoné Malan, Jacobus D Scheepers, Nicolaas T Malan
Alcohol contributes greatly to vascular and structural modifications. Due to differences in the metabolism and tolerance of alcohol between ethnic groups, the manner of these modifications may differ. We investigated the association between alcohol consumption - measured via ethnic-specific gamma glutamyl transferase (γ-GT) cut-points - and markers of cardiac perfusion, electrical activity, and pre-clinical structural alterations. A South African target population study was performed in a bi-ethnic cohort (n = 405)...
September 14, 2017: Alcohol
https://www.readbyqxmd.com/read/29412518/atrium-specific-ion-channels-in-the-zebrafish-a-role-of-ikach-in-atrial-repolarization
#11
Mark A Skarsfeldt, Sofia H Bomholtz, Pia R Lundegaard, Angelica Lopez-Izquierdo, Martin Tristani-Firouzi, Bo Hjorth Bentzen
AIM: The zebrafish has emerged as a novel model for investigating cardiac physiology and pathology. The aim of the current study is to investigate the atrium specific ion channels responsible for shaping the atrial cardiac action potential in zebrafish. METHODS: Using quantitative polymerase chain reaction we assessed the expression level of atrium specific potassium channels. The functional role of these channels was studied by patch clamp experiments on isolated atrial and ventricular cardiomyocytes, and by optical mapping of explanted adult zebrafish hearts...
February 7, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29408965/impacts-of-estrus-expression-and-intensity-during-a-timed-ai-protocol-on-variables-associated-with-fertility-and-pregnancy-success-in-bos-indicus-influenced-beef-cows
#12
A D Rodrigues, R F Cooke, R S Cipriano, L G T Silva, R L A Cerri, L H Cruppe, M Meneghetti, K G Pohler, J L M Vasconcelos
This experiment evaluated the impacts of estrus expression and intensity, estimated by physical activity during a timed-AI protocol, on reproductive performance of Bos indicus-influenced beef cows. A total of 290 lactating, primiparous and multiparous non-pregnant Nelore × Angus cows received a 2 mg injection of estradiol benzoate and an intravaginal progesterone (P4) releasing device (CIDR) on d -11, a 12.5 mg injection of PGF2α on d -4, CIDR removal in addition to 0.6 mg injection of estradiol cypionate and 300 IU injection of eCG on d -2, and timed-AI on d 0...
February 2, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29403653/prevalence-of-gram-negative-bacilli-isolated-from-the-equipment-and-surfaces-in-hospital-wards-of-golestan-province-north-of-iran
#13
Ali Asghar Ayatollahi, Abolfazl Amini, Somayeh Rahimi, Saeid Rahbar Takrami, Reza Kazemi Darsanaki, Muhammad Sadeqi Nezhad
Nosocomial infections are one of the most common causes of death in hospitals. This study aimed to determine the prevalence of gram-negative bacilli isolated from the equipment in hospital wards of the Golestan province, in the year 2015. In this cross-sectional study in 2015, 1980 samples from medical and nonmedical equipment and surfaces were collected from the wards of 13 teaching hospitals, in the Golestan province. Samples were inoculated into eosin methylene blue agar and blood agar culture media and isolated colonies were identified by standard biochemical tests...
December 18, 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/29396505/genetic-background-dominates-the-susceptibility-to-ventricular-arrhythmias-in-a-murine-model-of-%C3%AE-adrenergic-stimulation
#14
Marisa Jelinek, Charlotte Wallach, Heimo Ehmke, Alexander Peter Schwoerer
In cardiovascular research, several mouse strains with differing genetic backgrounds are used to investigate mechanisms leading to and sustaining ventricular arrhythmias. The genetic background has been shown to affect the studied phenotype in other research fields. Surprisingly little is known about potential strain-specific susceptibilities towards ventricular arrhythmias in vivo. Here, we hypothesized that inter-strain differences reported in the responsiveness of the β-adrenergic pathway, which is relevant for the development of arrhythmias, translate into a strain-specific vulnerability...
February 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29361722/textile-concentric-ring-electrodes-for-ecg-recording-based-on-screen-printing-technology
#15
José Vicente Lidón-Roger, Gema Prats-Boluda, Yiyao Ye-Lin, Javier Garcia-Casado, Eduardo Garcia-Breijo
Among many of the electrode designs used in electrocardiography (ECG), concentric ring electrodes (CREs) are one of the most promising due to their enhanced spatial resolution. Their development has undergone a great push due to their use in recent years; however, they are not yet widely used in clinical practice. CRE implementation in textiles will lead to a low cost, flexible, comfortable, and robust electrode capable of detecting high spatial resolution ECG signals. A textile CRE set has been designed and developed using screen-printing technology...
January 21, 2018: Sensors
https://www.readbyqxmd.com/read/29357508/early-blood-pressure-response-to-isometric-exercise-is-attenuated-in-obese-individuals-who-have-undergone-bariatric-surgery
#16
Jacqueline K Limberg, Winston Guo, Michael J Joyner, Nisha Charkoudian, Timothy B Curry
Blood pressure (BP) reactivity is predictive of cardiovascular disease. We hypothesized the BP response at the onset of isometric handgrip exercise would occur earlier and to a lesser degree in individuals who underwent bariatric surgery when compared to obese adults and the reliance on total peripheral resistance (TPR) would be attenuated. METHODS: Twenty-six individuals (7 non-obese, 11 obese, 8 post-bariatric surgery) completed isometric handgrip exercise (40% maximum voluntary contraction) to exhaustion...
December 21, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29357505/chemoreflex-mediated-arrhythmia-during-apnea-at-5050m-in-low-but-not-high-altitude-natives
#17
Stephen A Busch, Hannah E Davies, Sean Van Diepen, Lydia L Simpson, Frances Sobierajski, Laurel Riske, Mike Stembridge, Philip N Ainslie, Christopher K Willie, Ryan L Hoiland, Jonathan P Moore, Craig D Steinback
Peripheral chemoreflex mediated increases in both parasympathetic and sympathetic drive under chronic hypoxia may evoke brady-arrhythmias during apneic periods. We determined if: a) voluntary apnea unmasks arrhythmia at sea level and altitude (5050m), b) if high altitude natives (Nepalese Sherpa) exhibit similar cardiovagal responses at altitude; and c) if brady-arrhythmias at altitude are partially chemoreflex mediated. Participants were grouped as Lowlanders (n=14; age=27{plus minus}6yrs) and Nepalese Sherpa (n=8; age=32{plus minus}11yrs)...
December 21, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29348285/vancomycin-induced-coronary-artery-spasm-a-case-of-kounis-syndrome
#18
Eric Martinez, Sonu Sahni, Muhammad Ai Cheema, Asma Iftikhar
Kounis syndrome defined as the appearance of acute coronary syndrome in the context of an allergic reaction is a relatively rare phenomenon. There are three variants of this syndrome in which the patient presents with symptoms of an acute chest. Herein, we describe a case of an 83-year-old woman who demonstrated type I variant of Kounis syndrome in response to vancomycin administration. After initialisation of vancomycin, she became unresponsive and an ECG demonstrated ST changes consistent with inferior-lateral myocardial infarction...
January 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29341881/clinical-implications-of-technological-advances-in-screening-for-atrial-fibrillation
#19
REVIEW
Nikhil Singh, Sung Chun, David Hadley, Victor Froelicher
The incidence of atrial fibrillation (AF) continues to increase worldwide as people live longer. AF is the leading cause of stroke among patients older than 75 years and is responsible for at least 15% of all strokes. Industry has responded to this problem with a plethora of monitoring devices. These include single lead ECG adhesive sensors, implantable loop recorders, smartphone attachments and wearables. This review will concentrate on clinical studies using these technologies. There are wearables including watches and watch-like devices that will be mentioned but these have not been validated for clinical use...
January 13, 2018: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/29330154/novel-wearable-seismocardiography-and-machine-learning-algorithms-can-assess-clinical-status-of-heart-failure-patients
#20
Omer T Inan, Maziyar Baran Pouyan, Abdul Q Javaid, Sean Dowling, Mozziyar Etemadi, Alexis Dorier, J Alex Heller, A Ozan Bicen, Shuvo Roy, Teresa De Marco, Liviu Klein
BACKGROUND: Remote monitoring of patients with heart failure (HF) using wearable devices can allow patient-specific adjustments to treatments and thereby potentially reduce hospitalizations. We aimed to assess HF state using wearable measurements of electrical and mechanical aspects of cardiac function in the context of exercise. METHODS AND RESULTS: Patients with compensated (outpatient) and decompensated (hospitalized) HF were fitted with a wearable ECG and seismocardiogram sensing patch...
January 2018: Circulation. Heart Failure
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