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https://www.readbyqxmd.com/read/28920895/matched-filtering-for-heart-rate-estimation-on-compressive-sensing-ecg-measurements
#1
Giulia Da Poian, Christopher J Rozell, Riccardo Bernardini, Roberto Rinaldo, Gari D Clifford
OBJECTIVE: Compressive Sensing (CS) has recently been applied as a low complexity compression framework for long-term monitoring of electrocardiogram signals using Wireless Body Sensor Networks. Long-term recording of ECG signals can be useful for diagnostic purposes and to monitor the evolution of several widespread diseases. In particular, beat to beat intervals provide important clinical information, and these can be derived from the ECG signal by computing the distance between QRS complexes (R-peaks)...
September 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28919290/utility-and-limitations-of-long-term-monitoring-of-atrial-fibrillation-using-an-implantable-loop-recorder
#2
Randall Lee, Suneet Mittal
Atrial fibrillation (AF) is the most common cardiac arrhythmia diagnosed and treated in the world. The treatment of patients' symptoms as well as the prevention of stroke and heart failure is dependent on accurate detection and characterization of AF. A variety of electrocardiographic (ECG) monitoring techniques are being used for these purposes. However, these intermittent ECG monitoring techniques have been shown to under diagnose AF events, while having limited ability to characterize AF burden and density...
September 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28918617/right-ventricular-thrombosis-combined-with-fetal-death-and-acrocyanosis-in-pregnancy
#3
Feridoun Sabzi, Aghigh Heidari
Prepartum or postpartum right ventricular thrombosis (RVT) is an exceedingly rare and potentially lethal phenomenon in pregnancy. We here report a case of a pregnant patient with near term pregnancy admitted for dyspnea, amniotic fluids discharge and labor pain in a gynecology center that an eight-month dead fetus was diagnosed and delivered vaginally by induction. A post delivery period was complicated by aggravation of her dyspnea and pleuritic chest pain that she referred for further evaluation in our cardiac center...
July 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28918212/an-%C3%AE-glucosidase-inhibitor-could-reduce-t-wave-alternans-in-type-2-diabetes-patients
#4
Kazuo Eguchi, Takahiro Komori, Toshinobu Saito, Satoshi Hoshide, Kazuomi Kario
BACKGROUND: We tested the hypothesis that an alpha-glucosidase inhibitor (α-GI), miglitol, is effective in protecting the cardiovascular system in type 2 diabetes mellitus (T2DM). METHODS: We studied 19 hospitalized heart disease patients with T2DM in whom we performed continuous glucose monitoring, Holter electrocardiogram, and ambulatory blood pressure (BP) monitoring simultaneously for 48h. The α-GI miglitol was administered for half of the study period by a cross-over fashion...
August 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28910675/equine-chorionic-gonadotropin-administration-after-insemination-affects-luteal-function-and-pregnancy-establishment-in-postpartum-anestrous-beef-cows
#5
R Núñez-Olivera, T de Castro, G A Bó, J Piaggio, A Menchaca
Two experiments were conducted with the aim of determining the effect of equine chorionic gonadotropin (eCG) administration on day 14 after insemination on ovarian response and pregnancy establishment in postpartum anestrous beef cows. In both experiments, cows were subjected to a progesterone- and estradiol-based treatment for fixed-time artificial insemination (FTAI) and were randomly allocated into 4 groups to receive or not receive eCG (400 IU) at the time of device removal and/or at 14 d after FTAI. In experiment 1, from day 14 to 22, daily ultrasonographic determinations were performed to monitor ovarian dynamics, and blood was collected to determine hormone concentrations in 60 cows...
August 31, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28904084/relevance-of-supraventricular-runs-detected-after-cerebral-ischemia
#6
Mark Weber-Krüger, Constanze Lutz, Antonia Zapf, Raoul Stahrenberg, Joachim Seegers, Janin Witzenhausen, Katrin Wasser, Gerd Hasenfuß, Klaus Gröschel, Rolf Wachter
OBJECTIVE: Prolonged ECG monitoring after stroke frequently reveals short paroxysmal atrial fibrillation (pAF) and supraventricular (SV) runs. The minimal duration of atrial fibrillation (AF) required to induce cardioembolism, the relevance of SV runs, and whether short pAF results from cerebral damage itself are currently being debated. We aimed to study the relevance of SV runs and short pAF detected by prolonged Holter ECG after cerebral ischemia during long-term follow-up. METHODS: Analysis is from the prospective Find-AF trial (ISRCTN46104198)...
September 13, 2017: Neurology
https://www.readbyqxmd.com/read/28899884/supraventricular-tachycardia-diagnosed-by-smartphone-ecg
#7
Ariana Tabing, Travis Edward Harrell, Steven Romero, Gregory Francisco
Diagnosis of paroxysmal supraventricular tachycardia (PSVT) may be difficult due to its episodic nature, which can be brief and self-limited, limiting the ability for clinicians to diagnose the specific rhythm disorder in a timely manner. We present a case of PSVT, which was unable to be diagnosed through typical evaluation with an event monitor despite several years of symptoms. The patient was ultimately diagnosed using the AliveCor Mobile ECG, a smartphone-based ECG device and application, which he purchased himself and captured a typical atrioventricular node re-entrant tachycardia...
September 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28890792/multicentre-analysis-of-current-st-elevation-myocardial-infarction-acute-care-pathways
#8
Joppe Tra, Carolien de Blok, Ineke van der Wulp, Martine C de Bruijne, Cordula Wagner
BACKGROUND: Rapid reperfusion with percutaneous coronary intervention (PCI) is vital for patients with ST segment elevation myocardial infarction (STEMI). However, the guideline-recommended time targets are regularly exceeded. The goal of this study was to gain insight into how Dutch PCI centres try to achieve these time targets by comparing their care processes with one another and with the European guideline-recommended process. In addition, accelerating factors perceived by care providers were identified...
2017: Open Heart
https://www.readbyqxmd.com/read/28884653/smartphone-electrographic-monitoring-for-atrial-fibrillation-in-acute-ischemic-stroke-and-transient-ischemic-attack
#9
Hans T Tu, Ziyuan Chen, Corey Swift, Leonid Churilov, Ruibing Guo, Xinfeng Liu, Jim Jannes, Vincent Mok, Ben Freedman, Stephen M Davis, Bernard Yan
Rationale Paroxysmal atrial fibrillation is a common and preventable cause of devastating strokes. However, currently available monitoring methods, including Holter monitoring, cardiac telemetry and event loop recorders, have drawbacks that restrict their application in the general stroke population. AliveCor™ heart monitor, a novel device that embeds miniaturized electrocardiography (ECG) in a smartphone case coupled with an application to record and diagnose the ECG, has recently been shown to provide an accurate and sensitive single lead ECG diagnosis of atrial fibrillation...
October 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28869899/a-deep-convolutional-neural-network-model-to-classify-heartbeats
#10
U Rajendra Acharya, Shu Lih Oh, Yuki Hagiwara, Jen Hong Tan, Muhammad Adam, Arkadiusz Gertych, Ru San Tan
The electrocardiogram (ECG) is a standard test used to monitor the activity of the heart. Many cardiac abnormalities will be manifested in the ECG including arrhythmia which is a general term that refers to an abnormal heart rhythm. The basis of arrhythmia diagnosis is the identification of normal versus abnormal individual heart beats, and their correct classification into different diagnoses, based on ECG morphology. Heartbeats can be sub-divided into five categories namely non-ectopic, supraventricular ectopic, ventricular ectopic, fusion, and unknown beats...
August 24, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28867577/biological-properties-of-cardiac-mesenchymal-stem-cells-in-rats-with-diabetic-cardiomyopathy
#11
Diógenes Rodrigo Maronezzi de Paula, Vanessa Capuano, Daniel Mendes Filho, Anna Cecília Dias Maciel Carneiro, Virgínia de Oliveira Crema, Lucas Felipe de Oliveira, Aldo Rogélis Aquiles Rodrigues, Nicola Montano, Valdo José Dias da Silva
Cardiomyopathy is a major outcome in patients with diabetes mellitus (DM) and contributes to the high morbidity/mortality observed in this disease. AIMS: To evaluate several biological properties of cardiac mesenchymal stem cells (cMSCs) in a rat model of streptozotocin-induced DM with concomitant diabetic cardiomyopathy. MAIN METHODS: After 10weeks of DM induction, diabetic and control rats were assessed using ECG and ventricular hemodynamics monitoring. Then, the hearts were excised and processed for histology and for extracting non-cardiomyocytic cells...
August 31, 2017: Life Sciences
https://www.readbyqxmd.com/read/28867265/implantable-cardioverter-defibrillator-implantation-rates-after-out-of-hospital-cardiac-arrest-are-the-rates-guideline-concordant
#12
Edwin C Ho, Sheldon Cheskes, Paul Angaran, Laurie J Morrison, Theresa Aves, Cathy Zhan, Dennis T Ko, Paul Dorian
BACKGROUND: Clinical practice guidelines recommend implantable cardioverter defibrillators (ICDs) for the secondary prevention of sudden death after a cardiac arrest not from a reversible cause, but "real world" implantation rates are not well described. METHODS: Adults with out of hospital cardiac arrest attended by Emergency Medical Services are captured in the Toronto Regional RescuNET database. We analyzed those who survived to hospital discharge and collected data on age, sex, initial rhythm, ST-elevation myocardial infarction (STEMI) on presenting electrocardiogram (ECG), in-hospital revascularization, neurologic status (Modified Rankin Scale [MRS]) at discharge, and admission hospital type...
August 23, 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28866768/providers-response-to-clinical-decision-support-for-qt-prolonging-drugs
#13
Sunita Sharma, J Martijn Bos, Robert F Tarrell, Gyorgy J Simon, Bruce W Morlan, Michael J Ackerman, Pedro J Caraballo
Commonly used drugs in hospital setting can cause QT prolongation and trigger life-threatening arrhythmias. We evaluate changes in prescribing behavior after the implementation of a clinical decision support system to prevent the use of QT prolonging medications in the hospital setting. We conducted a quasi-experimental study, before and after the implementation of a clinical decision support system integrated in the electronic medical record (QT-alert system). This system detects patients at risk of significant QT prolongation (QTc>500ms) and alerts providers ordering QT prolonging drugs...
September 2, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28866596/a-410-nw-efficient-qrs-processor-for-mobile-ecg-monitoring-in-0-18-%C3%AE-m-cmos
#14
Peng Li, Xu Zhang, Ming Liu, Xiaohui Hu, Bo Pang, Zhaolin Yao, Hanjun Jiang, Hongda Chen
This paper proposes a low power and efficient QRS processor for real-time and continuous mobile ECG monitoring. The QRS detector contains the wavelet transform (WT), the modulus maxima pair identification (MMPI), and the R position modification (RPM). In order to reduce power consumption, we choose the Haar function as the mother wavelet of WT. It is implemented by an optimized FIR filter structure where none of the multiplier is used. The MMPI processes the wavelet coefficients at scale 2 (4) and provides candidate R peak positions for the RPM...
August 29, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28863640/synchronous-acquisition-of-multi-channel-signals-by-single-channel-adc-based-on-square-wave-modulation
#15
Xiaoqing Yi, Liling Hao, Fangfang Jiang, Lisheng Xu, Shaoxiu Song, Gang Li, Ling Lin
Synchronous acquisition of multi-channel biopotential signals, such as electrocardiograph (ECG) and electroencephalograph, has vital significance in health care and clinical diagnosis. In this paper, we proposed a new method which is using single channel ADC to acquire multi-channel biopotential signals modulated by square waves synchronously. In this method, a specific modulate and demodulate method has been investigated without complex signal processing schemes. For each channel, the sampling rate would not decline with the increase of the number of signal channels...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28853316/effect-of-electromagnetic-field-accompanying-the-magnetic-resonance-imaging-on-human-heart-rate-variability%C3%A2-%C3%A2-a-pilot-study
#16
Arkadiusz Derkacz, Jakub Gawrys, Karolina Gawrys, Maciej Podgorski, Agnieszka Magott-Derkacz, Rafał Poreba, Adrian Doroszko
The effect of electromagnetic field on cardiovascular system in the literature is defined in ambiguous way. The aim of this study was to evaluate the effect of electromagnetic field on the heart rate variability (HRV) during the examination with magnetic resonance. Forty-two patients underwent Holter ECG heart monitoring for 30 minutes twice: immediately before and after the examination with magnetic resonance imaging (MRI). HRV was analysed by assessing a few selected time and spectral parameters. Is has been shown that standard deviation of NN intervals (SDNN) and very low frequency rates increased, whereas the low frequency:high frequency parameter significantly decreased following the MRI examination...
August 30, 2017: International Journal of Injury Control and Safety Promotion
https://www.readbyqxmd.com/read/28852941/monitoring-of-cardiac-remodeling-in-a-mouse-model-of-pressure-overload-left-ventricular-hypertrophy-with-18-f-fdg-micropet
#17
Andrei Todica, Nick L Beetz, Lisa Günther, Mathias J Zacherl, Ulrich Grabmaier, Bruno Huber, Peter Bartenstein, Stefan Brunner, Sebastian Lehner
PURPOSE: This study aims to analyze the left ventricular function parameters, scar load, and hypertrophy in a mouse model of pressure-overload left ventricular (LV) hypertrophy over the course of 8 weeks using 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]FDG) micro-positron emission tomography (microPET) imaging. PROCEDURES: LV hypertrophy was induced in C57BL/6 mice by transverse aortic constriction (TAC). Myocardial hypertrophy developed after 2-4 weeks. ECG-gated microPET scans with [(18)F]FDG were performed 4 and 8 weeks after surgery...
August 29, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28851729/assessment-of-remote-heart-rhythm-sampling-using-the-alivecor-heart-monitor-to-screen-for-atrial-fibrillation-the-rehearse-af-study
#18
Julian P J Halcox, Kathie Wareham, Antonia Cardew, Mark Gilmore, James P Barry, Ceri Phillips, Michael B Gravenor
Background -Asymptomatic atrial fibrillation (AF) is increasingly common in the aging population and implicated in many ischemic strokes. Earlier identification of AF with appropriate anticoagulation may decrease stroke morbidity and mortality. Methods -We conducted a randomized controlled trial of AF screening using an AliveCor Kardia monitor attached to a WiFi-enabled iPod to obtain ECGs (iECGs) in ambulatory patients. Patients ≥65 years of age with a CHADS-VASc score ≥2 free from AF were randomized to the iECG arm or routine care (RC)...
August 28, 2017: Circulation
https://www.readbyqxmd.com/read/28851409/mobile-phones-in-cryptogenic-stroke-patients-bringing-single-lead-ecgs-for-atrial-fibrillation-detection-mobile-af-study-protocol-for-a-randomised-controlled-trial
#19
Roderick W Treskes, Willem Gielen, Marieke J Wermer, Robert W Grauss, Anouk P van Alem, Reza Alizadeh Dehnavi, Charles J Kirchhof, Enno T van der Velde, Arie C Maan, Ron Wolterbeek, Onno M Overbeek, Martin J Schalij, Serge A Trines
BACKGROUND: Recently published randomised clinical trials indicate that prolonged electrocardiom (ECG) monitoring might enhance the detection of paroxysmal atrial fibrillation (AF) in cryptogenic stroke or transient ischaemic attack (TIA) patients. A device that might be suitable for prolonged ECG monitoring is a smartphone-compatible ECG device (Kardia Mobile, Alivecor, San Francisco, CA, USA) that allows the patient to record a single-lead ECG without the presence of trained health care staff...
August 29, 2017: Trials
https://www.readbyqxmd.com/read/28845401/the-role-of-nt-probnp-in-the-diagnosis-of-ventricular-arrhythmias-in-patients-with-systemic-sclerosis
#20
Lucian Muresan, Ana Petcu, Crina Muresan, Mirela Rinzis, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea, Simona Rednic
BACKGROUND: In patients with systemic sclerosis, NT-proBNP is a useful diagnostic marker for pulmonary hypertension and ventricular dysfunction, with important prognostic significance. The aim of this study was to assess the relationship between the NT-proBNP levels and the presence and severity of ventricular arrhythmias in patients with scleroderma. METHODS: Forty consecutive patients with a diagnostic of systemic sclerosis according to the EULAR criteria admitted at the Rheumatology Clinic of Cluj-Napoca, Romania, from Jan 2014 to Apr 2014 were enrolled...
July 2017: Iranian Journal of Public Health
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