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https://www.readbyqxmd.com/read/28527890/mechano-electric-coupling-heterogeneity-in-repolarization-and-the-electrocardiographic-t-wave
#1
REVIEW
V M F Meijborg, C N W Belterman Va, J M T de Bakker, R Coronel, C E Conrath
Stretch influences repolarization by mechano-electric coupling (MEC) and contributes to arrhythmogenesis. Although there is an abundance of research on electrophysiological effects of MEC, it is still unclear how MEC translates to the ECG. We aim to provide an overview of the MEC research focused on the ECG and the underlying changes in electrophysiology. In addition, we present new data on the effect of left ventricular pressure on the electrocardiographic T-wave. We show that an increase in left ventricular pressure leads to prolonged QT-intervals with increased amplitudes of the STT-segment...
May 17, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28509783/the-evaluation-of-adolescent-chest-pain-a-screening-ecg-or-psc-17
#2
Patricia E Acra, María T Pérez
PURPOSE OF REVIEW: The present review offers an update on entities presenting as chest pain in the adolescent population. It discusses recently proposed tools and shared mental models used in primary and urgent care settings to evaluate chest pain, and their focus on identifying life-threatening processes. We consider whether the current practice may be improved by accounting for the increasingly recognized non-life-threatening causes of adolescent chest pain. RECENT FINDINGS: The present experiences and behaviors of adolescents have added new causes of chest pain to the work-up of this disquieting chief complaint...
May 13, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28496929/management-of-patients-with-atrial-fibrillation-focus-on-treatment-options
#3
REVIEW
Pawel Matusik, Jacek Lelakowski, Barbara Malecka, Jacek Bednarek, Remigiusz Noworolski
Atrial fibrillation (AF) is leading cardiac arrhythmia with important clinical implications. Its diagnosis is usually made on the basis on 12-lead ECG or 24-hour Holter monitoring. More and more clinical evidence supports diagnostic use of cardiac event recorders and cardiovascular implantable electronic devices (CIED). Treatment options in patients with atrial fibrillation are extensive and are based on chosen rhythm and/or rate control strategy. The use and selected contraindications to AF related pharmacotherapy, including anticoagulants are shown...
October 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/28458554/patient-characteristics-associated-with-false-arrhythmia-alarms-in-intensive-care
#4
Patricia R Harris, Jessica K Zègre-Hemsey, Daniel Schindler, Yong Bai, Michele M Pelter, Xiao Hu
INTRODUCTION: A high rate of false arrhythmia alarms in the intensive care unit (ICU) leads to alarm fatigue, the condition of desensitization and potentially inappropriate silencing of alarms due to frequent invalid and nonactionable alarms, often referred to as false alarms. OBJECTIVE: The aim of this study was to identify patient characteristics, such as gender, age, body mass index, and diagnosis associated with frequent false arrhythmia alarms in the ICU. METHODS: This descriptive, observational study prospectively enrolled patients who were consecutively admitted to one of five adult ICUs (77 beds) at an urban medical center over a period of 31 days in 2013...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28457177/high-sensitivity-cardiac-troponin-assays-from-improved-analytical-performance-to-enhanced-risk-stratification
#5
Marek Kozinski, Magdalena Krintus, Jacek Kubica, Grazyna Sypniewska
Implementation of cardiac troponin (cTn) assays has revolutionized the diagnosis, risk stratification, triage and management of patients with suspected myocardial infarction (MI). The Universal Definition of MI brought about a shift in the diagnostics of MI, from an approach primarily based on electrocardiography (ECG) to one primarily based on biomarkers. Currently, detection of a rise and/or fall in concentration or activity of myocardial necrosis biomarkers, preferentially cTns, with at least one value above the 99th percentile upper reference limit (URL), is the essential component for the diagnosis of MI...
May 2017: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/28451686/data-requirements-for-the-correct-identification-of-medication-errors-and-adverse-drug-events-in-patients-presenting-at-an-emergency-department
#6
Bettina Plank-Kiegele, Thomas Bürkle, Fabian Müller, Andrius Patapovas, Anja Sonst, Barbara Pfistermeister, Harald Dormann, Renke Maas
BACKGROUND: Adverse drug events (ADE) involving or not involving medication errors (ME) are common, but frequently remain undetected as such. Presently, the majority of available clinical decision support systems (CDSS) relies mostly on coded medication data for the generation of drug alerts. It was the aim of our study to identify the key types of data required for the adequate detection and classification of adverse drug events (ADE) and medication errors (ME) in patients presenting at an emergency department (ED)...
April 28, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28444167/electrical-cardiac-injuries-current-concepts-and-management
#7
Victor Waldmann, Kumar Narayanan, Nicolas Combes, Daniel Jost, Xavier Jouven, Eloi Marijon
Electrical injuries are a commonly encountered hazard in both the home and workplace. However, clinicians are often uncomfortable when faced with the patient who presents with an electric shock due to sparse literature and lack of systematic recommendations on this topic. Electrical injuries can range from minor skin burns to life threatening internal organ damage. A thorough clinical assessment to ascertain the path of current through the body and possible internal injury is essential. The main concern in an apparently stable individual after an electric shock is the potential for delayed occurrence of cardiac arrhythmias which will require monitoring in the intensive care setting...
April 20, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28427903/atrial-fibrillation-is-associated-with-hypermethylation-in-human-left-atrium-and-treatment-with-decitabine-reduces-atrial-tachyarrhythmias-in-spontaneously-hypertensive-rats
#8
R Doñate Puertas, E Meugnier, C Romestaing, C Rey, E Morel, J Lachuer, N Gadot, A Scridon, C Julien, F Tronc, B Chapuis, C Valla, A Janin, L Pirola, A Méjat, S Rome, P Chevalier
Atrial fibrillation (AF) is the most common cardiac arrhythmia. As the molecular mechanisms underlying the pathology are largely unknown, this cardiac arrhythmia remains difficult to treat. To identify specific molecular actors involved in AF, we have performed a transcriptomic analysis on left atrium (LA) from patients with valvular heart disease with or without AF. We showed that 1627 genes had altered basal expression level in LA tissue of AF patients compared with the control group. The significantly enriched gene ontology biological process "anatomical structure morphogenesis" contained the highest number of genes in line with changes in structure that occur when the human heart remodels following AF development (ie, LA dilatation and interstitial fibrosis)...
March 30, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28360032/a-multimodality-strategy-for-cardiovascular-risk-assessment-performance-in-two-population-based-cohorts
#9
James A de Lemos, Colby R Ayers, Benjamin D Levine, Christopher R deFilippi, Thomas J Wang, W Gregory Hundley, Jarett D Berry, Stephen L Seliger, Darren K McGuire, Pamela Ouyang, Mark H Drazner, Matthew J Budoff, Philip Greenland, Christie M Ballantyne, Amit Khera
Background -Current strategies for cardiovascular disease (CVD) risk assessment among adults without known CVD are limited by suboptimal performance and a narrow focus on only atherosclerotic CVD (ASCVD). We hypothesized that a strategy combining promising biomarkers across multiple different testing modalities would improve global and atherosclerotic CVD risk assessment among individuals without known CVD. Methods -We included participants from the Multi-Ethnic Study of Atherosclerosis (MESA, n=6621) and Dallas Heart Study (DHS, n=2202) who were free from CVD and underwent measurement of left ventricular hypertrophy by electrocardiogram (ECG-LVH), coronary artery calcium (CAC), N-terminal pro B-type natriuretic peptide (NT-proBNP), high-sensitivity cardiac troponin T (hs-cTnT) and high-sensitivity C-reactive protein (hs-CRP)...
March 30, 2017: Circulation
https://www.readbyqxmd.com/read/28347441/assessment-of-a-personalized-and-distributed-patient-guidance-system
#10
Mor Peleg, Yuval Shahar, Silvana Quaglini, Tom Broens, Roxana Budasu, Nick Fung, Adi Fux, Gema García-Sáez, Ayelet Goldstein, Arturo González-Ferrer, Hermie Hermens, M Elena Hernando, Val Jones, Guy Klebanov, Denis Klimov, Daniel Knoppel, Nekane Larburu, Carlos Marcos, Iñaki Martínez-Sarriegui, Carlo Napolitano, Àngels Pallàs, Angel Palomares, Enea Parimbelli, Belén Pons, Mercedes Rigla, Lucia Sacchi, Erez Shalom, Pnina Soffer, Boris van Schooten
OBJECTIVES: The MobiGuide project aimed to establish a ubiquitous, user-friendly, patient-centered mobile decision-support system for patients and for their care providers, based on the continuous application of clinical guidelines and on semantically integrated electronic health records. Patients would be empowered by the system, which would enable them to lead their normal daily lives in their regular environment, while feeling safe, because their health state would be continuously monitored using mobile sensors and self-reporting of symptoms...
May 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/28336387/the-word-heart-federation-roadmap-for-nonvalvular-atrial-fibrillation
#11
Adrianna Murphy, Amitava Banerjee, Günter Breithardt, A John Camm, Patrick Commerford, Ben Freedman, J Antonio Gonzalez-Hermosillo, Jonathan L Halperin, Chu-Pak Lau, Pablo Perel, Denis Xavier, David Wood, Xavier Jouven, Carlos A Morillo
BACKGROUND: The World Heart Federation has undertaken an initiative to develop a series of Roadmaps to promote development of national policies and health systems approaches, and to identify potential roadblocks on the road to effective prevention, detection, and management of cardiovascular disease in low-and middle-income countries (LMICs) and develop strategies for overcoming these. This Roadmap focuses on atrial fibrillation (AF). AF is the most common, clinically significant arrhythmia and, among other clinical outcomes, is associated with increased risk of stroke...
March 20, 2017: Global Heart
https://www.readbyqxmd.com/read/28285129/green-tea-flavanols-protect-human-%C3%AE-b-crystallin-from-oxidative-photodamage
#12
Susmitnarayan Chaudhury, Pritam Roy, Swagata Dasgupta
Age related cataract is a major cause of visual loss worldwide that is a result of opacification of the eye lens proteins. One of the major reasons behind this deterioration is UV induced oxidative damage. The study reported here is focused on an investigation of the oxidative stress induced damage to γB-crystallin under UV exposure. Human γB-crystallin has been expressed and purified from E. coli. We have found that epicatechin gallate (ECG) has a higher affinity towards the protein compared to epigallocatechin (EGC)...
March 8, 2017: Biochimie
https://www.readbyqxmd.com/read/28270398/pulmonary-vein-mass-with-extension-to-the-left-atrium-diagnosed-by-echocardiography
#13
Jezreel Labrador Taquiso, Jaime Alfonso Manalo Aherrera, Jose Donato Magno, Eric Oliver Sison
We report a case of a man aged 65 years presenting with chronic cough, haemoptysis and intermittent atrial tachyarrhythmias on ECG. On 2D transthoracic echocardiography, an incidental left atrial mass was seen, initially thought to be a thrombus predisposed by intermittent atrial fibrillation. Transoesophageal echocardiography confirmed that this left atrial mass originated from a fixed, non-homogenous, right superior pulmonary vein mass with an extracardiac extension. Because of this finding, a thorough search for a primary focus lead to the discovery of a contiguous posterior mediastinal mass, which was a round cell neoplasm on histology...
March 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28269145/measuring-pulse-rate-variability-using-long-range-non-contact-imaging-photoplethysmography
#14
Ethan B Blackford, Alyssa M Piasecki, Justin R Estepp
Camera-based measurement of the blood volume pulse via non-contact, imaging photoplethysmography is a very popular approach for measuring pulse rate using a remote imaging sensor. Comparatively less attention has been paid to the usefulness of the method for measuring features of pulse rate variability, and even less focus has been put on the accuracy of any cardiac activity feature that can be achieved at long imager-to-subject distances. In this study, video was recorded from 19 participants, while at rest, at a distance of 25 meters from the imaging sensor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268912/photoplethysmography-derivatives-and-pulse-transit-time-in-overnight-blood-pressure-monitoring
#15
Sobhan Salari Shahrbabaki, Beena Ahmed, Thomas Penzel, Dean Cvetkovic
Overnight continuous blood pressure measurement provides simultaneous monitoring of blood pressure and sleep architecture. By this means, we are able to investigate whether different sleep events are associated to blood pressure fluctuations. In this paper, we used the Pulse Transit Time (PTT) to develop and evaluate functions for measurement of blood pressure. We focused on the first and second derivatives of fingertip Photoplethysmography (PPG) recordings to detect PPG critical points. By applying R wave of ECG and PPG critical points, we created two PTT-based models for estimation of systolic and diastolic blood pressure (SBP and DBP)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268118/the-role-of-early-focused-cardiac-ultrasound-in-a-not-so-typical-presentation-of-takotsubo-cardiomyopathy-a-case-report
#16
Jithin G Varghese, Qurat-Ul-Ain Jelani, Stuart Zarich, Brooks Walsh
BACKGROUND: Focused cardiac ultrasound (FoCUS) can be extremely helpful in identifying unexpected diagnoses that can significantly alter treatment options. The diagnosis of Takotsubo cardiomyopathy (TCM) may be difficult to identify. CASE REPORT: We describe a 47-year-old woman who presented to the emergency department (ED) with atypical features of TCM. Her clinical features included being a premenopausal woman with mild chest pain with a lack of identifiable emotional or physical stressors or significant electrocardiographic changes...
March 3, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28253254/novel-non-invasive-algorithm-to-identify-the-origins-of-re-entry-and-ectopic-foci-in-the-atria-from-64-lead-ecgs-a-computational-study
#17
Erick A Perez Alday, Michael A Colman, Philip Langley, Henggui Zhang
Atrial tachy-arrhytmias, such as atrial fibrillation (AF), are characterised by irregular electrical activity in the atria, generally associated with erratic excitation underlain by re-entrant scroll waves, fibrillatory conduction of multiple wavelets or rapid focal activity. Epidemiological studies have shown an increase in AF prevalence in the developed world associated with an ageing society, highlighting the need for effective treatment options. Catheter ablation therapy, commonly used in the treatment of AF, requires spatial information on atrial electrical excitation...
March 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28245585/a-novel-technique-for-fetal-ecg-extraction-using-single-channel-abdominal-recording
#18
Nannan Zhang, Jinyong Zhang, Hui Li, Omisore Olatunji Mumini, Oluwarotimi Williams Samuel, Kamen Ivanov, Lei Wang
Non-invasive fetal electrocardiograms (FECGs) are an alternative method to standard means of fetal monitoring which permit long-term continual monitoring. However, in abdominal recording, the FECG amplitude is weak in the temporal domain and overlaps with the maternal electrocardiogram (MECG) in the spectral domain. Research in the area of non-invasive separations of FECG from abdominal electrocardiograms (AECGs) is in its infancy and several studies are currently focusing on this area. An adaptive noise canceller (ANC) is commonly used for cancelling interference in cases where the reference signal only correlates with an interference signal, and not with a signal of interest...
February 24, 2017: Sensors
https://www.readbyqxmd.com/read/28238152/myocardial-infarction-in-neonates-a-review-of-an-entity-with-significant-morbidity-and-mortality
#19
REVIEW
Koyelle Papneja, Anthony K Chan, Tapas K Mondal, Bosco Paes
Coronary artery disease is a global problem with high mortality rates and significant residual sequelae that affect long-term quality of life. Myocardial infarction (MI) in neonates is a recognized, uncommon entity, but the incidence and broad spectrum of the disease is unknown and likely underestimated due to limited reporting which in the majority is confined to acute ischemic events. The challenges involve clinical diagnosis which masquerades in the early phase as non-specific symptoms and signs that are commonly found in a host of neonatal disorders...
March 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28227374/measuring-pulse-rate-variability-using-long-range-non-contact-imaging-photoplethysmography
#20
Ethan B Blackford, Alyssa M Piasecki, Justin R Estepp, Ethan B Blackford, Alyssa M Piasecki, Justin R Estepp, Ethan B Blackford, Alyssa M Piasecki, Justin R Estepp
Camera-based measurement of the blood volume pulse via non-contact, imaging photoplethysmography is a very popular approach for measuring pulse rate using a remote imaging sensor. Comparatively less attention has been paid to the usefulness of the method for measuring features of pulse rate variability, and even less focus has been put on the accuracy of any cardiac activity feature that can be achieved at long imager-to-subject distances. In this study, video was recorded from 19 participants, while at rest, at a distance of 25 meters from the imaging sensor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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