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https://www.readbyqxmd.com/read/30337072/automated-recognition-of-cardiac-arrhythmias-using-sparse-decomposition-over-composite-dictionary
#1
Sandeep Raj, Kailash Chandra Ray
BACKGROUND AND OBJECTIVE: Cardiovascular diseases (CVDs) are the leading cause of deaths worldwide. Due to an increase in the rate of global mortalities, biopathological signal processing and evaluation are widely used in the ambulatory situations for healthcare applications. For decades, the processing of pathological electrocardiogram (ECG) signals for arrhythmia detection has been thoroughly studied for diagnosis of various cardiovascular diseases. Apart from these studies, efficient diagnosis of ECG signals remains a challenge in the clinical cardiovascular domain due to its non-stationary nature...
October 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/30328801/electrocardiographic-predictors-of-mortality-in-patients-after-percutaneous-coronary-interventions-a-nested-case-control-study
#2
Jin Li, Dominic Wyrsch, Dik Heg, Michael Stoller, Thomas Zanchin, Tilman Perrin, Stephan Windecker, Lorenz Räber, Laurent Roten
BACKGROUND: The outcome of patients undergoing percutaneous coronary interventions (PCIs) varies considerably. Several ECG parameters have recently emerged (PQ interval, P-wave, T-peak-to-T-end interval, T-wave, T/R ratio, J-wave) beyond traditional markers (rhythm, QRS, Q-wave, QT interval, ST segment) and were attributed important prognostic value in the setting of coronary artery disease. The present study integrated for the first time these ECG parameters altogether with the aim to determine their role in predicting patients' outcome after a PCI...
October 17, 2018: Acta Cardiologica
https://www.readbyqxmd.com/read/30322147/high-resolution-seismocardiogram-acquisition-and-analysis-system
#3
Fábio Leitão, Eurico Moreira, Filipe Alves, Mário Lourenço, Olga Azevedo, João Gaspar, Luis A Rocha
Several devices and measurement approaches have recently been developed to perform ballistocardiogram (BCG) and seismocardiogram (SCG) measurements. The development of a wireless acquisition system (hardware and software), incorporating a novel high-resolution micro-electro-mechanical system (MEMS) accelerometer for SCG and BCG signals acquisition and data treatment is presented in this paper. A small accelerometer, with a sensitivity of up to 0.164 µs/µg and a noise density below 6.5 µg/ Hz is presented and used in a wireless acquisition system for BCG and SCG measurement applications...
October 13, 2018: Sensors
https://www.readbyqxmd.com/read/30321643/inherent-physiological-artifacts-in-eeg-during-tdcs
#4
Nigel Gebodh, Zeinab Esmaeilpour, Devin Adair, Kenneth Chelette, Jacek Dmochowski, Adam J Woods, Emily S Kappenman, Lucas C Parra, Marom Bikson
Online imaging and neuromodulation is invalid if stimulation distorts measurements beyond the point of accurate measurement. In theory, combining transcranial Direct Current Stimulation (tDCS) with electroencephalography (EEG) is compelling, as both use non-invasive electrodes and image-guided dose can be informed by the reciprocity principle. To distinguish real changes in EEG from stimulation artifacts, prior studies applied conventional signal processing techniques (e.g. high-pass filtering, ICA). Here, we address the assumptions underlying the suitability of these approaches...
October 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/30290328/the-role-of-minocycline-in-alleviating-aluminum-phosphide-induced-cardiac-hemodynamic-and-renal-toxicity
#5
Hamed Haghi-Aminjan, Maryam Baeeri, Mahban Rahimifard, Ahad Alizadeh, Mahshid Hodjat, Shokoufeh Hassani, Mohammad Hossein Asghari, Alireza Abdollahi, Tina Didari, Rohollah Hosseini, Mohammad Sharifzadeh, Mohammad Abdollahi
Poisoning with aluminum phosphide (AlP) has been attributed to the high rate of mortality among many Asian countries. It affects several organs, mainly heart and kidney. Numerous literature demonstrated the valuable effect of minocycline in mitigating pathological symptoms of heart and kidney disease. The aim of the present study was to evaluate the probable protective effect of minocycline on cardiac hemodynamic parameters abnormalities and renal toxicity induced by AlP-poisoning in the rat model. AlP was administered by gavage at 12 mg/kg body weight followed by injection of minocycline for two interval times of 12 and 24 h, at 40, 80, 120 mg/kg body weight...
October 2, 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/30282519/two-case-reports-of-wellens-syndrome
#6
Xiqiang Wang, Jingjing Sun, Zhuokun Feng, Yuan Gao, Chaofeng Sun, Guoliang Li
Wellens' syndrome is characterised by particular changes in electrocardiogram (ECG) precordial lead T-waves accompanied by proximal stenosis of the left anterior descending (LAD) artery. Two cases of electrocardiographic changes associated with Wellens' syndrome are presented here. Case 1, a 55-year-old female, was transferred to the First Affiliated Hospital of Xi'an Jiaotong University with intermittent and laborious angina pectoris. Her first ECG on admission revealed T-wave inversion in leads V1-V3 and biphasic T-waves in V4...
October 3, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/30260996/can-smartphone-wireless-ecgs-be-used-to-accurately-assess-ecg-intervals-in-pediatrics-a-comparison-of-mobile-health-monitoring-to-standard-12-lead-ecg
#7
Melanie R F Gropler, Aarti S Dalal, George F Van Hare, Jennifer N Avari Silva
BACKGROUND: Arrhythmias in children are often paroxysmal, complicating the ability to capture the abnormal rhythm on routine ECG during an outpatient visit. The Alivecor Kardia Mobile (KM) device is a wireless mobile health (mHealth) device that generates a single lead ECG tracing with a FDA-approved algorithm for detection of atrial fibrillation in adults. OBJECTIVE: The goal of this study is to assess the accuracy of interval measurements on KM tracings by directly comparing to standard 12-lead ECGs in pediatric patients...
2018: PloS One
https://www.readbyqxmd.com/read/30222233/racism-is-not-a-factor-in-door-to-ecg-times-of-patients-with-symptoms-of-acute-coronary-syndrome-a-prospective-observational-study
#8
Martha H Mackay, Pamela A Ratner, Gerry Veenstra, Frank X Scheuermeyer, Maja Grubisic, Krishnan Ramanathan, Craig Murray, Karin H Humphries
BACKGROUND: Investigators have identified important racial-identity/ethnicity-based differences in some aspects of acute coronary syndrome (ACS) care and outcomes (time to presentation, symptoms, receipt of coronary angiography/revascularization, repeat revascularization, mortality). Patient-based differences such as pathophysiology and treatment-seeking behaviour account only partly for these outcome differences. We sought to investigate whether there are racial-identity/ethnicity-based variations in the initial emergency department (ED) triage and care of patients with suspected ACS in Canadian hospitals...
September 17, 2018: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/30211688/cardiac-anomaly-detection-based-on-time-and-frequency-domain-features-using-tree-based-classifiers
#9
Martin Kropf, Dieter Hayn, Daniel-Armando Morris, Aravind-Kumar Radhakrishnan, Evgeny Belyavskiy, Athanasios Frydas, Elisabeth Pieske-Kraigher, Burkert Pieske, Günter Schreier

 Recent advantages in mHealth-enabled ECG recorders boosted the demand for algorithms, which are able to automatically detect cardiac anomalies with high accuracy. 
 Approach:
 We present a combined method of classical signal analysis and machine learning which has been developed during the Computing in Cardiology Challenge (CinC) 2017. Almost 400 hand-crafted features have been developed to reflect the complex physiology of cardiac arrhythmias and their appearance in single-channel ECG recordings...
September 13, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/30146395/clinical-effects-of-reported-synthetic-cannabinoid-exposure-in-patients-admitted-to-the-intensive-care-unit
#10
Michael Tatusov, Maryann Mazer-Amirshahi, Aleeza Abbasi, Munish Goyal
OBJECTIVE: To characterize the clinical presentation and hospital course of patients with reported synthetic cannabinoid (SC) exposure requiring Intensive Care Unit (ICU) admission. DESIGN: Retrospective case series of patients admitted to medical or cardiac ICU. SETTING: Urban tertiary care center. PARTICIPANTS: Adults ≥18 years old admitted from the emergency department (ED) in 2015. MEASUREMENTS: Demographics, Sequential Organ Failure Assessment (SOFA) scores, and clinical parameters documenting the effects and hospital course...
August 18, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/30123488/assessment-of-atrial-conduction-times-in-patients-with-newly-diagnosed-parkinson-s-disease
#11
Yiğit Çanga, Ayşe Emre, Gülbün Asuman Yüksel, Mehmet Baran Karataş, Nizamettin Selçuk Yelgeç, Ufuk Gürkan, Ali Nazmi Çalık, Hülya Tireli, Sait Terzi
Background: An increased risk of ischemic stroke has been reported in patients with Parkinson's disease (PD). Atrial fibrillation (AF) is strongly associated with ischemic stroke. Prolonged atrial electromechanical delay (EMD) is an independent predictor for the development of AF. Aims: The aim of the present study was to evaluate the atrial conduction parameters in patients with PD and to assess their relation with the severity of PD. Study design: We prospectively enrolled 51 consecutive patients with newly diagnosed PD and 31 age- and sex-matched non-PD subjects...
2018: Parkinson's Disease
https://www.readbyqxmd.com/read/30073854/cardiac-arrhythmias-electrolyte-abnormalities-and-serum-cardiac-glycoside-concentrations-in-yellow-oleander-cascabela-thevetia-poisoning-a-prospective-study
#12
Anandhi D, Vinay R Pandit, Tamilarasu Kadhiravan, Soundaravally R, K N J Prakash Raju
BACKGROUND: Consumption of yellow oleander (Cascabela thevetia) is a popular method of intentional self-harm in South India. OBJECTIVES: The objectives of this study were to identify the cardiac arrhythmias and electrolyte abnormalities in yellow oleander poisoning and to identify the association between electrolyte abnormalities, cardiac glycoside concentrations at admission and the severity of cardiotoxicity. This study was also designed to identify clinical and biochemical parameters at presentation which predict serious arrhythmias and determinants of mortality...
August 3, 2018: Clinical Toxicology
https://www.readbyqxmd.com/read/30073720/predictors-of-myocardial-functional-recovery-following-successful-reperfusion-of-acute-st-elevation-myocardial-infarction
#13
Islam ElSayed Shehata, Cheng-I Cheng, Pei-Hsun Sung, Ahmed S Ammar, Islam Abd El-Moneem El-Sherbiny, Islam Ghanem Ahmed Ghanem
BACKGROUND: Following acute ST elevation myocardial infarction (STEMI), restoration of large-vessel patency does not mean complete perfusion recovery. Little is known regarding the predictors of successful myocardial reperfusion for the STEMI patients undergoing pharmacologic and mechanical reperfusion strategies. AIM OF THE WORK: The aim of this clinical study was to find out the predictors of myocardial functional recovery following reperfusion of acute STEMI, represented by 3-month global longitudinal strain (GLS) value assessed by speckle tracking echocardiography...
October 2018: Echocardiography
https://www.readbyqxmd.com/read/30050449/inactivation-of-serotonergic-neurons-in-the-rostral-medullary-raph%C3%A3-attenuates-stress-induced-tachypnea-and-tachycardia-in-mice
#14
Yoko Ikoma, Ikue Kusumoto-Yoshida, Akihiro Yamanaka, Youichirou Ootsuka, Tomoyuki Kuwaki
The medullary raphé nuclei are involved in controlling cardiovascular, respiratory, and thermoregulatory functions, as well as mediating stress-induced tachycardia and hyperthermia. Although the serotonergic system of the medullary raphé has been suggested as the responsible entity, specific evidence has been insufficient. In the present study, we tested this possibility by utilizing an optogenetic approach. We used genetically modified mice [tryptophan hydroxylase 2 (Tph2); archaerhodopsin-T (ArchT) mice] in which ArchT, a green light-driven neuronal silencer, was selectively expressed in serotonergic neurons under the regulation of Tph2 promoters...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/30049496/importance-of-structural-heart-disease-and-diastolic-dysfunction-in-heart-failure-with-preserved-ejection-fraction-assessed-according-to-the-esc-guidelines-a-substudy-in-the-ka-karolinska-ren-rennes-study
#15
Hans Persson, Erwan Donal, Lars H Lund, Dmitri Matan, Emmanuel Oger, Camilla Hage, Jean-Claude Daubert, Cecilia Linde
AIMS: To study prevalence and prognostic importance of diagnostic echocardiographic variables in patients with suspected heart failure with preserved ejection fraction (HFpEF) in the prospective KaRen register study. METHODS AND RESULTS: KaRen patients were included following an acute HF-presentation, using Framingham criteria, B-type natriuretic peptide (BNP) >100 ng/L or N-terminal pro-BNP (NT-pro-BNP) >300 ng/L, and left ventricular (LV) ejection fraction ≥45%...
June 20, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/30035575/aripiprazole-induced-atrial-fibrillation-in-a-patient-with-concomitant-risk-factors
#16
Giordano D'Urso, Annalisa Anastasia, Elena Toscano, Sara Patti, Andrea de Bartolomeis
Aripiprazole is an atypical antipsychotic drug with a polypharmacological mechanism of action and a favorable tolerability profile. Its major indications are schizophrenia and mania in adults and adolescents. Here we present the case of a 43-year-old Caucasian man with schizophrenia who developed atrial fibrillation (AF) after starting aripiprazole treatment. Prior to this treatment, he had never received any antipsychotic drugs. On admission to our inpatient unit, he showed severe psychotic symptoms and was started on aripiprazole with a rapid titration regimen (15 mg on the first day and then 15 mg twice daily thereafter) in combination with lorazepam (2...
July 23, 2018: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/30034231/t-wave-peak-to-end-interval-in-copd
#17
Seda Tural Onur, Samim Emet, Sinem Nedime Sokucu, Imran Onur
Introduction: The interval from the peak to the end of the electrocardiographic (ECG) T wave (Tp-Te) can estimate cardiovascular mortality and ventricular tachyarrhythmias. Objectives: In this study, we aimed to define a new ECG parameter in patients with COPD. Methods: This was a cross-sectional observational study that included COPD patients who were diagnosed previously and followed up in the outpatient clinic. All data of the patients' demographic features, history, spirometry, and electrocardiographs were analyzed...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/30004461/heart-rate-and-heart-rate-variability-during-sleep-in-family-dogs-canis-familiaris-moderate-effect-of-pre-sleep-emotions
#18
Bence Varga, Anna Gergely, Ágoston Galambos, Anna Kis
The domestic dog ( Canis familiaris ) has been shown to both excel in recognising human emotions and produce emotion-related vocalisations and postures that humans can easily recognise. However, little is known about the effect of emotional experiences on subsequent sleep physiology, a set of phenomena heavily interrelated with emotions in the case of humans. The present paper examines heart rate (HR) and heart rate variability (HRV) during dogs' sleep, measures that are influenced by both positive and negative emotions in awake dogs...
July 2, 2018: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/29990026/breathing-rate-estimation-from-the-electrocardiogram-and-photoplethysmogram-a-review
#19
Peter H Charlton, Drew A Birrenkott, Timothy Bonnici, Marco A F Pimentel, Alistair E W Johnson, Jordi Alastruey, Lionel Tarassenko, Peter J Watkinson, Richard Beale, David A Clifton
Breathing rate (BR) is a key physiological parameter used in a range of clinical settings. Despite its diagnostic and prognostic value, it is still widely measured by counting breaths manually. A plethora of algorithms have been proposed to estimate BR from the electrocardiogram (ECG) and pulse oximetry (photoplethysmogram, PPG) signals. These BR algorithms provide opportunity for automated, electronic, and unobtrusive measurement of BR in both healthcare and fitness monitoring. This paper presents a review of the literature on BR estimation from the ECG and PPG...
2018: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/29990025/full-impedance-cardiography-measurement-device-using-raspberry-pi3-and-system-on-chip-biomedical-instrumentation-solutions
#20
Abdelakram Hafid, Sara Benouar, Malika Kedir-Talha, Farhad Abtahi, Mokhtar Attari, Fernando Seoane
Impedance Cardiography (ICG) is a non-invasive method for monitoring cardiac dynamics using Electrical Bioimpedance (EBI) measurements. Since its appearance more than 40 years ago, ICG has been used for assessing hemodynamic parameters. This paper present a measurement system based on two System on Chip (SoC) solutions and Raspberry PI, implementing both a full 3-lead ECG recorder and an impedance cardiographer, for educational and research development purposes. Raspberry PI is a platform supporting Do-It-Yourself project and education applications across the world...
December 15, 2017: IEEE Journal of Biomedical and Health Informatics
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