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https://www.readbyqxmd.com/read/30106699/multi-scaled-fusion-of-deep-convolutional-neural-networks-for-screening-atrial-fibrillation-from-single-lead-short-ecg-recordings
#1
Xiaomao Fan, Qihang Yao, Yunpeng Cai, Fen Miao, Fangmin Sun, Ye Li
Atrial fibrillation (AF) is one of the most common sustained chronic cardiac arrhythmia in elderly population, associated with a high mortality and morbidity in stroke, heart failure, coronary artery disease, systemic thromboembolism, etc. The early detection of AF is necessary for averting the possibility of disability or mortality. However, AF detection remains problematic due to its episodic pattern. In this paper, a multi-scaled fusion of deep convolutional neural network (MSCNN) is proposed to screen out AF recordings from single lead short ECG recordings...
August 7, 2018: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/30073024/emotion-recognition-based-on-weighted-fusion-strategy-of-multichannel-physiological-signals
#2
Wei Wei, Qingxuan Jia, Yongli Feng, Gang Chen
Emotion recognition is an important pattern recognition problem that has inspired researchers for several areas. Various data from humans for emotion recognition have been developed, including visual, audio, and physiological signals data. This paper proposes a decision-level weight fusion strategy for emotion recognition in multichannel physiological signals. Firstly, we selected four kinds of physiological signals, including Electroencephalography (EEG), Electrocardiogram (ECG), Respiration Amplitude (RA), and Galvanic Skin Response (GSR)...
2018: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/30061094/a-novel-12-lead-electrocardiographic-system-for-home-use-development-and-usability-testing
#3
Annemarijn Sm Steijlen, Kaspar Mb Jansen, Armagan Albayrak, Derk O Verschure, Diederik F Van Wijk
BACKGROUND: Cardiovascular diseases (CVD) are the leading cause of morbidity and mortality worldwide. Early diagnosis is of pivotal importance for patients with cardiac arrhythmias and ischemia to minimize the consequences like strokes and myocardial infarctions. The chance of capturing signals of arrhythmias or ischemia is substantially high when a 12-lead electrocardiogram (ECG) can be recorded at the moment when a patient experiences the symptoms. However, until now, available diagnostic systems (Holter monitors and other wearable ECG sensors) have not enabled patients to record a reliable 12-lead ECG at home...
July 30, 2018: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/30049414/a-novel-automated-diagnostic-system-for-classification-of-myocardial-infarction-ecg-signals-using-an-optimal-biorthogonal-filter-bank
#4
Manish Sharma, Ru San Tan, U Rajendra Acharya
Myocardial infarction (MI), also referred to as heart attack, occurs when there is an interruption of blood flow to parts of the heart, due to the acute rupture of atherosclerotic plaque, which leads to damage of heart muscle. The heart muscle damage produces changes in the recorded surface electrocardiogram (ECG). The identification of MI by visual inspection of the ECG requires expert interpretation, and is difficult as the ECG signal changes associated with MI can be short in duration and low in magnitude...
July 23, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/30043115/-18-f-florbetaben-whole-body-pet-mri-for-evaluation-of-systemic-amyloid-deposition
#5
Lucia Baratto, Sonya Youngju Park, Negin Hatami, Praveen Gulaka, Shreyas Vasanawala, Thomas Koshy Yohannan, Robert Herfkens, Ronald Witteles, Andrei Iagaru
BACKGROUND: Florbetaben, a 18 F-labeled stilbene derivative (Neuraceq®, formerly known as BAY-949172), is a diagnostic radiopharmaceutical developed to visualize β-amyloid plaques in the brain. Here, we report a pilot study evaluating patients with suspected cardiac amyloidosis for systemic extent of disease. METHODS: We prospectively enrolled nine patients, 61-86 year old (mean ± SD 69.4 ± 8.6), referred from the cardiac amyloid clinic. First, dynamic imaging of the heart was acquired immediately after injection of 222-318...
July 24, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/30015782/the-role-of-computed-tomography-in-the-planning-of-transcatheter-aortic-valve-implantation-a-retrospective-analysis-in-200-procedures
#6
Marcello Chiocchi, Marco Forcina, Daniele Morosetti, Luca Pugliese, Armando Ugo Cavallo, Daniele Citraro, Vincenzo De Stasio, Matteo Presicce, Roberto Floris, Francesco Romeo
AIM: The aim of our study is to show the importance of multislice computed tomography (CT) assessment in the overall management and diagnostic framework of transcatheter aortic valve replacement (TAVI) procedure candidates. METHODS: Between June 2015 and April 2017, 200 patients with severe aortic stenosis, not eligible for surgery, were enrolled, as defined by EuroSCORE; they were submitted to TAVI at the interventional cardiology department of the Tor Vergata Polyclinic...
July 13, 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29997022/image-based-modeling-of-acute-myocardial-ischemia-using-experimentally-derived-ischemic-zone-source-representations
#7
B M Burton, K K Aras, W W Good, J D Tate, B Zenger, R S MacLeod
BACKGROUND: Computational models of myocardial ischemia often use oversimplified ischemic source representations to simulate epicardial potentials. The purpose of this study was to explore the influence of biophysically justified, subject-specific ischemic zone representations on epicardial potentials. METHODS: We developed and implemented an image-based simulation pipeline, using intramural recordings from a canine experimental model to define subject-specific ischemic regions within the heart...
July 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29903630/automated-diagnosis-of-arrhythmia-using-combination-of-cnn-and-lstm-techniques-with-variable-length-heart-beats
#8
Shu Lih Oh, Eddie Y K Ng, Ru San Tan, U Rajendra Acharya
Arrhythmia is a cardiac conduction disorder characterized by irregular heartbeats. Abnormalities in the conduction system can manifest in the electrocardiographic (ECG) signal. However, it can be challenging and time-consuming to visually assess the ECG signals due to the very low amplitudes. Implementing an automated system in the clinical setting can potentially help expedite diagnosis of arrhythmia, and improve the accuracies. In this paper, we propose an automated system using a combination of convolutional neural network (CNN) and long short-term memory (LSTM) for diagnosis of normal sinus rhythm, left bundle branch block (LBBB), right bundle branch block (RBBB), atrial premature beats (APB) and premature ventricular contraction (PVC) on ECG signals...
June 5, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29861450/cognitive-impact-and-psychophysiological-effects-of-stress-using-a-biomonitoring-platform
#9
Susana Rodrigues, Joana S Paiva, Duarte Dias, Marta Aleixo, Rui Manuel Filipe, João Paulo S Cunha
Stress can impact multiple psychological and physiological human domains. In order to better understand the effect of stress on cognitive performance, and whether this effect is related to an autonomic response to stress, the Trier Social Stress Test (TSST) was used as a testing platform along with a 2-Choice Reaction Time Task. When considering the nature and importance of Air Traffic Controllers (ATCs) work and the fact that they are subjected to high levels of stress, this study was conducted with a sample of ATCs ( n = 11)...
May 26, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29850808/the-performance-of-non-invasive-tests-to-rule-in-and-rule-out-significant-coronary-artery-stenosis-in-patients-with-stable-angina-a-meta-analysis-focused-on-post-test-disease-probability
#10
Juhani Knuuti, Haitham Ballo, Luis Eduardo Juarez-Orozco, Antti Saraste, Philippe Kolh, Anne Wilhelmina Saskia Rutjes, Peter Jüni, Stephan Windecker, Jeroen J Bax, William Wijns
Aims: To determine the ranges of pre-test probability (PTP) of coronary artery disease (CAD) in which stress electrocardiogram (ECG), stress echocardiography, coronary computed tomography angiography (CCTA), single-photon emission computed tomography (SPECT), positron emission tomography (PET), and cardiac magnetic resonance (CMR) can reclassify patients into a post-test probability that defines (>85%) or excludes (<15%) anatomically (defined by visual evaluation of invasive coronary angiography [ICA]) and functionally (defined by a fractional flow reserve [FFR] ≤0...
May 29, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29786776/a-framework-for-image-based-modeling-of-acute-myocardial-ischemia-using-intramurally-recorded-extracellular-potentials
#11
Brett M Burton, Kedar K Aras, Wilson W Good, Jess D Tate, Brian Zenger, Rob S MacLeod
The biophysical basis for electrocardiographic evaluation of myocardial ischemia stems from the notion that ischemic tissues develop, with relative uniformity, along the endocardial aspects of the heart. These injured regions of subendocardial tissue give rise to intramural currents that lead to ST segment deflections within electrocardiogram (ECG) recordings. The concept of subendocardial ischemic regions is often used in clinical practice, providing a simple and intuitive description of ischemic injury; however, such a model grossly oversimplifies the presentation of ischemic disease-inadvertently leading to errors in ECG-based diagnoses...
May 21, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29774391/comparison-of-left-ventricular-hypertrophy-by-electrocardiography-and-echocardiography-in-children-using-analytics-tool
#12
Lauren Tague, Justin Wiggs, Qianxi Li, Robert McCarter, Elizabeth Sherwin, Jacqueline Weinberg, Craig Sable
Left ventricular hypertrophy (LVH) is a common finding on pediatric electrocardiography (ECG) leading to many referrals for echocardiography (echo). This study utilizes a novel analytics tool that combines ECG and echo databases to evaluate ECG as a screening tool for LVH. SQL Server 2012 data warehouse incorporated ECG and echo databases for all patients from a single institution from 2006 to 2016. Customized queries identified patients 0-18 years old with LVH on ECG and an echo performed within 24 h. Using data visualization (Tableau) and analytic (Stata 14) software, ECG and echo findings were compared...
May 17, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29768159/-hypertrophic-cardiomyopathy-and-ischemic-heart-disease-the-problem-of-pathology-combination
#13
E A Kovalevskaya, N S Krylova, N G Poteshkina
Hypertrophic cardiomyopathy (HCM) is a disease with left ventricular hypertrophy caused by mutations in the genes of myocardial contractile proteins, whose frequency is about 0.5 %. Due to the high incidence of anginal pain and marked changes in ECG with HCM, the problem of diagnosing the combination of HCM and coronary artery disease (CAD) presents a rather difficult task for the clinician. The complexity of this diagnosis is due to the ability of standard methods of instrumental examination (ECG, a test with physical activity, stress tests in conjunction with visualization of the myocardium) to detect myocardial ischemia in both СAD and HCM...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29720202/optimization-of-late-gadolinium-enhancement-cardiovascular-magnetic-resonance-imaging-of-post-ablation-atrial-scar-a-cross-over-study
#14
Henry Chubb, Shadman Aziz, Rashed Karim, Christian Sohns, Orod Razeghi, Steven E Williams, John Whitaker, James Harrison, Amedeo Chiribiri, Tobias Schaeffter, Matthew Wright, Mark O'Neill, Reza Razavi
BACKGROUND: Cardiovascular magnetic resonance (CMR) imaging may be used to visualize post-ablation atrial scar (PAAS), and three-dimensional late gadolinium enhancement (3D LGE) is the most widely employed technique for imaging of chronic scar. Detection of PAAS provides a unique non-invasive insight into the effects of the ablation and may help guide further ablation procedures. However, there is evidence that PAAS is often not detected by CMR, implying a significant sensitivity problem, and imaging parameters vary between leading centres...
May 3, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29669562/comfort-in-palliative-sedation-compas-a-transdisciplinary-mixed-method-study-protocol-for-linking-objective-assessments-to-subjective-experiences
#15
Stefaan Six, Steven Laureys, Jan Poelaert, Johan Bilsen, Peter Theuns, Reginald Deschepper
BACKGROUND: In case of untreatable suffering at the end of life, palliative sedation may be chosen to assure comfort by reducing the patient's level of consciousness. An important question here is whether such sedated patients are completely free of pain. Because these patients cannot communicate anymore, caregivers have to rely on observation to assess the patient's comfort. Recently however, more sophisticated techniques from the neurosciences have shown that sometimes consciousness and pain are undetectable with these traditional behavioral methods...
April 18, 2018: BMC Palliative Care
https://www.readbyqxmd.com/read/29623770/atypical-presentation-of-acute-coronary-syndrome-acs-a-case-report
#16
Axel Van Damme, Philippe Vanderheeren, Tine De Backer, Françine Desimpel
Case A 45-year-old man presented at the emergency department (ED) with stomach pain since eight days. The patient was not worried about his symptoms and requested only pain relief. The emergency physician requested a consult of the gastroenterologist. Clinical examination was unremarkable. However, 12-lead ECG and ischemic markers were suggestive of acute coronary syndrome (ACS) which led to admission at the cardiology department. Despite delayed presentation, the patient was still referred for urgent coronary angiogram after receiving heparin, ticagrelor and acetylsalicylic acid because of persistent pain...
April 6, 2018: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29617993/navigation-of-lead-extraction-is-it-possible-impact-of-preprocedural-electrocardiogram-triggered-computed-tomography-on-navigation-of-lead-extraction
#17
Julia Vogler, Simon Pecha, Ryan Azarrafiy, Liesa Castro, Florian Deuschl, Clemens Spink, Matthias Linder, Ulrike von Hehn, Stephan Willems, Hermann Reichenspurner, Nils Gosau, Samer Hakmi
OBJECTIVES: As the number of transvenous lead extractions continues to increase, preprocedural protocols for this procedure must be assessed. The objective of this study was to determine whether an electrocardiogram (ECG)-triggered computed tomography (Et-CT) with three-dimensional (3D) reconstructions could aid lead extractors in choosing the optimal tools to improve procedural success and avoid complications. METHODS: In this study, 31 patients scheduled for transvenous lead extraction underwent a preprocedural Et-CT between January 2016 and May 2017...
March 30, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29544371/in-vitro-quantification-of-gutter-formation-and-chimney-graft-compression-in-chimney-evar-stent-graft-configurations-using-electrocardiography-gated-computed-tomography
#18
Simon P Overeem, Esmé J Donselaar, Jorrit T Boersen, Erik Groot Jebbink, Cornelis H Slump, Jean-Paul P M de Vries, Michel M P J Reijnen
PURPOSE: To assess the dynamic behavior of chimney grafts during the cardiac cycle. METHODS: Three chimney endovascular aneurysm repair (EVAR) stent-graft configurations (Endurant and Advanta V12, Endurant and Viabahn, and Endurant and BeGraft) were placed in silicone aneurysm models and subjected to physiologic flow. Electrocardiography (ECG)-gated contrast-enhanced computed tomography was used to visualize geometric changes during the cardiac cycle. Endograft and chimney graft surface, gutter volume, chimney graft angulation over the center lumen line, and the D-ratio (the ratio between the lengths of the major and minor axes) were independently assessed by 2 observers at 10 time points in the cardiac cycle...
June 2018: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/29412147/evaluation-of-chest-compression-artefact-removal-based-on-rhythm-assessments-made-by-clinicians
#19
Erik Alonso, Elisabete Aramendi, Unai Irusta, Mohamud Daya, Carlos Corcuera, Yuanzheng Lu, Ahamed H Idris
AIM: To evaluate the performance of a state-of-the-art cardiopulmonary resuscitation (CPR) artefact suppression method by assessing to what extent the filtered electrocardiogram (ECG) can be correctly diagnosed by emergency medicine doctors. METHODS: A total of 819 ECG segments were used. Each segment contained two consecutive 10 s intervals, an artefact free interval and an interval corrupted by CPR artefacts. Each ECG segment was digitally processed to remove CPR artefacts using an adaptive filter...
April 2018: Resuscitation
https://www.readbyqxmd.com/read/29406314/intsy-a-low-cost-open-source-wireless-multi-channel-bioamplifier-system
#20
Jonathan C Erickson, James A Hayes, Mauricio Bustamante, Rajwol Joshi, Alfred Rwagaju, Niranchan Paskaranandavadivel, Timothy R Angeli
OBJECTIVE: Multi-channel electrical recordings of physiologically generated signals are common to a wide range of biomedical fields. The aim of this work was to develop, validate, and demonstrate the practical utility of a high-quality, low-cost 32/64-channel bioamplifier system with real-time wireless data streaming capability. APPROACH: The new 'Intsy' system integrates three main off-the-shelf hardware components: (1) Intan RHD2132 bioamplifier; (2) Teensy 3...
March 29, 2018: Physiological Measurement
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