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https://www.readbyqxmd.com/read/28928046/new-directions-for-ambulatory-monitoring-following-2017-hrs-ishne-expert-consensus
#1
Emanuela T Locati
The main role of ambulatory electrocardiography (AECG) in clinical practice is to detect and characterize the behavior of cardiac electrical activity during ordinary daily life activities. Because certain rhythm abnormalities may be infrequent and paroxysmal, and may occur only during sleep or in association with mental, emotional, or exercise-induced perturbation in cardiac function, AECG needs to be recorded over a long period of time, originally lasting 24h and now expanding up to several weeks and even to months...
August 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28920895/matched-filtering-for-heart-rate-estimation-on-compressive-sensing-ecg-measurements
#2
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/28919593/electrocardiographic-algorithms-to-guide-a-management-strategy-of-idiopathic-outflow-tract-ventricular-arrhythmias
#3
Bartosz Ludwik, Karol Deutsch, Mariusz Mazij, Janusz Śledź, Aleksandra Morka, Michał Labus, Michał Chrabąszcz, Bartosz Szafran, Jerzy Śpikowski, Lesław Szydłowski, Sebastian M Stec
INTRODUCTION    The current guidelines of the European Society of Cardiology outlined electrocardiographic (ECG) differentiation of site of origin (SOO) in patients with idiopathic ventricular arrhythmias (IVA).  OBJECTIVES    The aim of this study was to compare three ECG algorithms for differentiating SOO and to determine their diagnostic value for the management of outflow tract IVA. PATIENTS AND METHODS    Patients with IVA with inferior axis who underwent successful radiofrequency catheter ablation (RFCA) using the 3D-electroanatomical system were analyzed...
September 6, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28916173/a-new-anatomical-view-on-the-vector-cardiogram-the-mean-temporal-spatial-isochrones
#4
Peter M van Dam
AIM: This proof of principle study aims to show the direct relationship between cardiac anatomy and the mean cardiac activation path as captured by the 12 lead ECG derived mean temporal-spatial isochrones (mean TSI) path. METHODS: To obtain the mean TSI signal a vector cardiographic (VCG) signal is constructed from the 12 lead ECG. The construction of the VCG signal uses a model of the heart and torso with patient specific electrode extracted from a 3D photo. The propagation of the activation through the heart is captured by estimating the mean of a cardiac activation isochrone using this VCG signal...
August 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28906540/reviewing-the-causes-of-electrocardiographic-pauses
#5
Charle Viljoen, Robert Smith, Ashley Chin
The electrocardiographic term 'pause' refers to the prolonged R-R interval that represents the interruption in ventricular depolarisation. This article presents a case of sinus node dysfunction and provides a diagnostic approach to pauses on the ECG.
July 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28906536/endomyocardial-fibrosis-in-sudan-clinical-and-echocardiographic-features
#6
Siddiq Ibrahim Khalil, Suha Khalil, Salma El Tigani, Hanan A Saad
OBJECTIVE: Endomyocardial fibrosis (EMF) is a rare disease and is often an underdiagnosed and forgotten cardiomyopathy. The objective of this study was to document the current frequency of EMF in Sudan by defining and selecting cases from patients attending the echocardiography laboratory. Additionally we aimed to create an EMF registry for Sudan. METHODS: The study started in January 2007 and is on-going. All the patients attending our echocardiography clinics in four different hospitals in Khartoum, Sudan, were included...
July 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28903861/a-decision-support-system-and-rule-based-algorithm-to-augment-the-human-interpretation-of-the-12-lead-electrocardiogram
#7
Andrew W Cairns, Raymond R Bond, Dewar D Finlay, Daniel Guldenring, Fabio Badilini, Guido Libretti, Aaron J Peace, Stephen J Leslie
BACKGROUND: The 12-lead Electrocardiogram (ECG) has been used to detect cardiac abnormalities in the same format for more than 70years. However, due to the complex nature of 12-lead ECG interpretation, there is a significant cognitive workload required from the interpreter. This complexity in ECG interpretation often leads to errors in diagnosis and subsequent treatment. We have previously reported on the development of an ECG interpretation support system designed to augment the human interpretation process...
August 9, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28900815/wavelet-based-encoding-scheme-for-controlling-size-of-compressed-ecg-segments-in-telecardiology-systems
#8
Asiya M Al-Busaidi, Lazhar Khriji, Farid Touati, Mohd Fadlee Rasid, Adel Ben Mnaouer
One of the major issues in time-critical medical applications using wireless technology is the size of the payload packet, which is generally designed to be very small to improve the transmission process. Using small packets to transmit continuous ECG data is still costly. Thus, data compression is commonly used to reduce the huge amount of ECG data transmitted through telecardiology devices. In this paper, a new ECG compression scheme is introduced to ensure that the compressed ECG segments fit into the available limited payload packets, while maintaining a fixed CR to preserve the diagnostic information...
September 12, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28900525/a-case-of-legionella-pneumophila-evaluated-with-ct-and-ultrasound
#9
Alessio D'Angelo, Chiara De Simone, Marco Pagnottella, Stefano Rossi, Raffaele Pepe, Giacomo Ruggieri, Giulio Cocco, Cosima Schiavone
A 36-year-old man was admitted to the emergency department of "SS Annunziata" hospital in Chieti complaining of a sharp chest pain arisen some hours before admission. On examination, the patient looked sweaty; his vital signs showed tachycardia and augmented breath rate; sinus tachycardia and normal ventricular repolarization were observed on ECG, and no abnormalities were observed in the echoscan of the hearth. According to the clinical and electrocardiographic findings, and to previous episode of DVT in anamnesis, a thorax CT scan was performed in order to rule out pulmonary embolism...
September 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28899884/supraventricular-tachycardia-diagnosed-by-smartphone-ecg
#10
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/28899346/one-symptom-two-arrhythmias-the-rare-and-the-even-rarer
#11
Florian Zauner, Jan-Thorben Sieweke, Stephan Hohmann, David Duncker, Christian Riehle, L Christian Napp, Ulrike Flierl, Thorben König, Christian Veltmann
BACKGROUND: Wolff-Parkinson-White (WPW) syndrome and idiopathic left ventricular tachycardia (ILVT) are rare and up to now the coexistence of both entities has rarely been reported. In patients with ventricular preexcitation the underlying mechanism of paroxysmal tachycardia most likely is atrioventricular reentrant tachycardia (AVRT). However, without ECG documentation of the tachycardia diagnosis of the underlying mechanism cannot be made due to similar clinical presentation of AVRT and ILVT...
September 12, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28895038/a-retrospective-external-validation-study-of-the-heart-score-among-patients-presenting-to-the-emergency-department-with-chest-pain
#12
Matthew Jay Streitz, Joshua James Oliver, Jessica Marie Hyams, Richard Michael Wood, Yevgeniy Mikhaylovich Maksimenko, Brit Long, Robert Michael Barnwell, Michael David April
Emergency physicians must be able to effectively prognosticate outcomes for patients presenting to the Emergency Department (ED) with chest pain. The HEART score offers a prognostication tool, but external validation studies are limited. We conducted an external retrospective validation study of the HEART score among ED patients presenting to our ED with chest pain from 1 January 2014 to 9 June 2014. We utilized chart review methodology to abstract data from each patient's electronic medical record. We collected data relevant to each of the five elements of the HEART score: history, electrocardiogram (ECG) interpretation, patient age, patient risk factors, and troponin levels...
September 11, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28894011/palpitations-in-a-72-year-old-woman
#13
Claire A Martin, Parag R Gajendragadkar, Sharad Agarwal
CLINICAL INTRODUCTION: A 72-year-old woman presented with an 8-year history of palpitations occurring every few weeks. They were sudden in onset, were associated with dizziness and could last for up to 2 hours. She was prescribed bisoprolol which reduced the frequency of events but did not abolish them. Baseline ECG and echocardiography were normal. She was referred for electrophysiological study. Despite initial difficulties, diagnostic catheters were placed in the right ventricular (RV) apex and in the coronary sinus (CS) via the right internal jugular vein and superior vena cava (SVC) (figure 1A)...
October 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28890792/multicentre-analysis-of-current-st-elevation-myocardial-infarction-acute-care-pathways
#14
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/28884264/ambulatory-screening-tool-for-sleep-apnea-analyzing-a-single-lead-electrocardiogram-signal-ecg
#15
Solveig Magnusdottir, Hugi Hilmisson
STUDY OBJECTIVE: The goal was to determine the utility and accuracy of automated analysis of single-lead electrocardiogram (ECG) data using two algorithms, cardiopulmonary coupling (CPC), and cyclic variation of heart rate (CVHR) to identify sleep apnea (SA). METHODS: The CPC-CVHR algorithms were applied to identify SA by analyzing ECG from diagnostic polysomnography (PSG) from 47 subjects. The studies were rescored according to updated AASM scoring rules, both manually by a certified technologist and using an FDA-approved automated scoring software, Somnolyzer (Philips Inc...
September 7, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28883920/exogenous-t3-toxicosis-following-consumption-of-a-contaminated-weight-loss-supplement
#16
R D'Arcy, M McDonnell, K Spence, C H Courtney
A 42-year-old male presented with a one-week history of palpitations and sweating episodes. The only significant history was of longstanding idiopathic dilated cardiomyopathy. Initial ECG demonstrated a sinus tachycardia. Thyroid function testing, undertaken as part of the diagnostic workup, revealed an un-measureable thyroid-stimulating hormone (TSH) and free thyroxine (T4). Upon questioning the patient reported classical thyrotoxic symptoms over the preceding weeks. Given the persistence of symptoms free tri-iodothyronine (T3) was measured and found to be markedly elevated at 48...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28869899/a-deep-convolutional-neural-network-model-to-classify-heartbeats
#17
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/28854987/-non-st-segment-elevation-acute-coronary-syndrome-recent-developments-in-diagnostics-and-treatment
#18
P Damman, R J de Winter
- This paper covers recent developments in diagnostics and treatment of patients presenting with non-ST segment elevation acute coronary syndrome.- For the diagnostic phase we focus on the role of the clinical presentation, the ECG and biomarkers.- In the acute phase, treatment mainly consists of pharmacological therapy and revascularisation; long-term treatment mainly involves pharmacological therapy, cardiac rehabilitation, and lifestyle changes.
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28845401/the-role-of-nt-probnp-in-the-diagnosis-of-ventricular-arrhythmias-in-patients-with-systemic-sclerosis
#19
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
https://www.readbyqxmd.com/read/28845370/seismocardiography-based-cardiac-computed-tomography-gating-using-patient-specific-template-identification-and-detection
#20
Jingting Yao, Srini Tridandapani, Carson A Wick, Pamela T Bhatti
To more accurately trigger cardiac computed tomography angiography (CTA) than electrocardiography (ECG) alone, a sub-system is proposed as an intermediate step toward fusing ECG with seismocardiography (SCG). Accurate prediction of quiescent phases is crucial to prospectively gating CTA, which is susceptible to cardiac motion and, thus, can affect the diagnostic quality of images. The key innovation of this sub-system is that it identifies the SCG waveform corresponding to heart sounds and determines their phases within the cardiac cycles...
2017: IEEE Journal of Translational Engineering in Health and Medicine
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