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https://www.readbyqxmd.com/read/29346192/image-quality-overall-evaluability-and-effective-radiation-dose-of-coronary-computed-tomography-angiography-with-prospective-electrocardiographic-triggering-plus-intracycle-motion-correction-algorithm-in-patients-with-a-heart-rate-over-65-beats-per-minute
#1
Gianluca Pontone, Giuseppe Muscogiuri, Andrea Baggiano, Daniele Andreini, Andrea I Guaricci, Marco Guglielmo, Fabio Fazzari, Saima Mushtaq, Edoardo Conte, Andrea Annoni, Alberto Formenti, Elisabetta Mancini, Massimo Verdecchia, Laura Fusini, Lorenzo Bonfanti, Elisa Consiglio, Mark G Rabbat, Antonio L Bartorelli, Mauro Pepi
PURPOSE: Recently, a new intracycle motion correction algorithm (MCA) was introduced to reduce motion artifacts from heart rate (HR) in coronary computed tomography angiography (cCTA). The aim of the study was to evaluate the image quality, overall evaluability, and effective radiation dose (ED) of cCTA with prospective electrocardiographic (ECG) triggering plus MCA as compared with standard protocol with retrospective ECG triggering in patients with HR≥65 bpm. MATERIALS AND METHODS: One hundred consecutive patients (67±10 y) scheduled for cCTA with 65<HR<80 bpm were retrospectively analyzed...
January 16, 2018: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/29337892/improving-remote-health-monitoring-a-low-complexity-ecg-compression-approach
#2
Mohamed Elgendi, Abdulla Al-Ali, Amr Mohamed, Rabab Ward
Recent advances in mobile technology have created a shift towards using battery-driven devices in remote monitoring settings and smart homes. Clinicians are carrying out diagnostic and screening procedures based on the electrocardiogram (ECG) signals collected remotely for outpatients who need continuous monitoring. High-speed transmission and analysis of large recorded ECG signals are essential, especially with the increased use of battery-powered devices. Exploring low-power alternative compression methodologies that have high efficiency and that enable ECG signal collection, transmission, and analysis in a smart home or remote location is required...
January 16, 2018: Diagnostics
https://www.readbyqxmd.com/read/29330154/novel-wearable-seismocardiography-and-machine-learning-algorithms-can-assess-clinical-status-of-heart-failure-patients
#3
Omer T Inan, Maziyar Baran Pouyan, Abdul Q Javaid, Sean Dowling, Mozziyar Etemadi, Alexis Dorier, J Alex Heller, A Ozan Bicen, Shuvo Roy, Teresa De Marco, Liviu Klein
BACKGROUND: Remote monitoring of patients with heart failure (HF) using wearable devices can allow patient-specific adjustments to treatments and thereby potentially reduce hospitalizations. We aimed to assess HF state using wearable measurements of electrical and mechanical aspects of cardiac function in the context of exercise. METHODS AND RESULTS: Patients with compensated (outpatient) and decompensated (hospitalized) HF were fitted with a wearable ECG and seismocardiogram sensing patch...
January 2018: Circulation. Heart Failure
https://www.readbyqxmd.com/read/29329416/automatic-ecg-based-detection-of-autonomic-arousals-and-their-association-with-cortical-arousals-leg-movements-and-respiratory-events-in-sleep
#4
Mads Olsen, Logan Douglas Schneider, Joseph Cheung, Paul E Peppard, Poul J Jennum, Emmanuel Mignot, Helge Bjarup Dissing Sorensen
Study objectives: The current definition of sleep arousals neglects to address the diversity of arousals and their systemic cohesion. Autonomic arousals (AA) are autonomic activations often associated with cortical arousals (CA), but they may also occur in isolation in relation to a respiratory event, a leg movement event or spontaneously, without any other physiological associations. AA should be acknowledged as essential events to understand and explore the systemic implications of arousals...
January 10, 2018: Sleep
https://www.readbyqxmd.com/read/29322351/from-pacemaker-to-wearable-techniques-for-ecg-detection-systems
#5
REVIEW
Ashish Kumar, Rama Komaragiri, Manjeet Kumar
With the alarming rise in the deaths due to cardiovascular diseases (CVD), present medical research scenario places notable importance on techniques and methods to detect CVDs. As adduced by world health organization, technological proceeds in the field of cardiac function assessment have become the nucleus and heart of all leading research studies in CVDs in which electrocardiogram (ECG) analysis is the most functional and convenient tool used to test the range of heart-related irregularities. Most of the approaches present in the literature of ECG signal analysis consider noise removal, rhythm-based analysis, and heartbeat detection to improve the performance of a cardiac pacemaker...
January 11, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29291535/detecting-atrial-fibrillation-by-deep-convolutional-neural-networks
#6
Yong Xia, Naren Wulan, Kuanquan Wang, Henggui Zhang
BACKGROUND: Atrial fibrillation (AF) is the most common cardiac arrhythmia. The incidence of AF increases with age, causing high risks of stroke and increased morbidity and mortality. Efficient and accurate diagnosis of AF based on the ECG is valuable in clinical settings and remains challenging. In this paper, we proposed a novel method with high reliability and accuracy for AF detection via deep learning. METHOD: The short-term Fourier transform (STFT) and stationary wavelet transform (SWT) were used to analyze ECG segments to obtain two-dimensional (2-D) matrix input suitable for deep convolutional neural networks...
December 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29284918/telemedicine-in-cardiology-perspectives-in-bosnia-and-herzegovina
#7
REVIEW
Nabil Naser, Salih Tandir, Edin Begic
Introduction: Aim of article was to present perspectives of telemedicine in the field of cardiology in Bosnia and Herzegovina. Material and methods: Article has descriptive character and present review of literature. Results: Information technology can have the application in the education of students, starting from basic medical sciences up to clinical subjects. Information technologies are used for ECG analysis, 24h ECG Holter monitoring, which detects different rhythm disorders...
December 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/29283466/improved-segmental-myocardial-strain-reproducibility-using-deformable-registration-algorithms-compared-with-feature-tracking-cardiac-mri-and-speckle-tracking-echocardiography
#8
Jie Wang, Weihao Li, Jiayu Sun, Hong Liu, Yu Kang, Dan Yang, Liuyu Yu, Andreas Greiser, Xiaoyue Zhou, Yuchi Han, Yucheng Chen
BACKGROUND: Segmental myocardial strain using feature tracking (FT) cardiac MRI is not acceptable due to poor reproducibility. PURPOSE: To assess the reproducibility of left ventricle (LV) segmental myocardial strain measured by deformation registration algorithm (DRA). STUDY TYPE: Prospective clinical trial. SUBJECTS: Sixteen healthy volunteers and 28 hypertrophic cardiomyopathy (HCM) patients. FIELD STRENGTH/SEQUENCE: Retrospective ECG gating cardiac MRI imaging was performed at 3...
December 28, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29260405/a-principal-component-analysis-based-data-fusion-method-for-ecg-derived-respiration-from-single-lead-ecg
#9
Yue Gao, Hong Yan, Zhi Xu, Meng Xiao, Jinzhong Song
An ECG-derived respiration (EDR) algorithm based on principal component analysis (PCA) is presented and applied to derive the respiratory signals from single-lead ECG. The respiratory-induced variabilities of ECG features, P-peak amplitude, Q-peak amplitude, R-peak amplitude, S-peak amplitude, T-peak amplitude and RR-interval, are fused by PCA to yield a better surrogate respiratory signal than other methods. The method is evaluated on data from the MIT-BIH polysomnographic database and validated against a "gold standard" respiratory obtained from simultaneously recorded respiration data...
December 19, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29238903/a-time-local-subset-feature-selection-for-prediction-of-sudden-cardiac-death-from-ecg-signal
#10
Elias Ebrahimzadeh, Mohammad Sajad Manuchehri, Sana Amoozegar, Babak Nadjar Araabi, Hamid Soltanian-Zadeh
Prediction of sudden cardiac death continues to gain universal attention as a promising approach to saving millions of lives threatened by sudden cardiac death (SCD). This study attempts to promote the literature from mere feature extraction analysis to developing strategies for manipulating the extracted features to target improvement of classification accuracy. To this end, a novel approach to local feature subset selection is applied using meticulous methodologies developed in previous studies of this team for extracting features from non-linear, time-frequency, and classical processes...
December 14, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29230874/symmetric-dimethylarginine-in-cats-with-hypertrophic-cardiomyopathy-and-diabetes-mellitus
#11
R Langhorn, I N Kieler, J Koch, L B Christiansen, L R Jessen
BACKGROUND: Symmetric dimethylarginine (SDMA) has been increasingly used as a marker of early chronic kidney disease (CKD) in cats, but little is known about the influence of comorbidities on SDMA in this species. HYPOTHESIS: Hypertrophic cardiomyopathy (HCM) and diabetes mellitus (DM), independently of CKD, are associated with changes in serum SDMA. ANIMALS: Ninety-four cats (17 with CKD, 40 with HCM, 17 with DM, and 20 healthy controls)...
December 12, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29222728/fetal-electrocardiogram-extraction-and-analysis-using-adaptive-noise-cancellation-and-wavelet-transformation-techniques
#12
P Sutha, V E Jayanthi
Birth defect-related demise is mainly due to congenital heart defects. In the earlier stage of pregnancy, fetus problem can be identified by finding information about the fetus to avoid stillbirths. The gold standard used to monitor the health status of the fetus is by Cardiotachography(CTG), cannot be used for long durations and continuous monitoring. There is a need for continuous and long duration monitoring of fetal ECG signals to study the progressive health status of the fetus using portable devices. The non-invasive method of electrocardiogram recording is one of the best method used to diagnose fetal cardiac problem rather than the invasive methods...
December 8, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29215160/new-figo-and-swedish-intrapartum-cardiotocography-classification-systems-incorporated-in-the-fetal-ecg-st-analysis-stan-interpretation-algorithm-agreements-and-discrepancies-in-cardiotocography-classification-and-evaluation-of-significant-st-events
#13
Per Olofsson, Håkan Norén, Ann Carlsson
The updated intrapartum cardiotocography (CTG) classification system by FIGO in 2015 (FIGO2015) and the FIGO2015-approached classification by the Swedish Society of Obstetricians and Gynecologist in 2017 (SSOG2017) are not harmonized with the fetal ECG ST analysis (STAN) algorithm from 2007 (STAN2007). The study aimed to reveal homogeneity and agreement between the systems in classifying CTG and ST events, and relate to maternal and perinatal outcomes MATERIAL AND METHODS: Among CTG traces with ST events, 100 traces originally classified as normal, 100 as suspicious and 100 as pathological were randomly selected from a STAN database and classified by two experts in consensus...
December 7, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/29209787/-different-levels-of-experience-with-anesthetic-agents-of-german-emergency-physicians-results-of-an-online-survey
#14
A Luckscheiter, M Fischer, W Zink
BACKGROUND AND OBJECTIVE: In 2015 practice management guidelines on prehospital emergency anesthesia in adults were published in Germany. The aim of the present study was to evaluate whether emergency physicians follow these guidelines in daily practice and to assess their level of experience with the use of anesthetic agents. MATERIAL AND METHODS: In an online survey the way of induction of preclinical anesthesia (including preoxygenation time and applied monitoring techniques) was assessed with the help of virtual scenarios based on the guidelines...
December 5, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/29205690/refinement-of-detecting-atrial-fibrillation-in-stroke-patients-results-from-the-track-af-study
#15
Florian Reinke, Markus Bettin, Linda Sarah Ross, Simon Kochhäuser, Ilka Kleffner, Martin Ritter, Jens Minnerup, Dirk Dechering, Lars Eckardt, Ralf Dittrich
BACKGROUND: Detection of occult atrial fibrillation (AF) is crucial for optimal secondary prevention in stroke patients. We determined the AF detection rate by implantable cardiac monitor (ICM) compared to the prediction rate of the probability of incident AF by software based analysis of continuously monitored ECG at follow up (Stroke risk analysis=SRA) and propose an optimized AF detection algorithm by combining both tools. METHODS: In a monocentric prospective study we investigated 105 out of 389 patients with cryptogenic stroke despite extensive diagnostic workup with two additional cardiac monitoring tools: (a) 20 month monitoring by ICM and (b) SRA during hospitalization at the Stroke Unit...
December 4, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29204258/a-remote-health-monitoring-system-for-the-elderly-based-on-smart-home-gateway
#16
Kai Guan, Minggang Shao, Shuicai Wu
This paper proposed a remote health monitoring system for the elderly based on smart home gateway. The proposed system consists of three parts: the smart clothing, the smart home gateway, and the health care server. The smart clothing collects the elderly's electrocardiogram (ECG) and motion signals. The home gateway is used for data transmission. The health care server provides services of data storage and user information management; it is constructed on the Windows-Apache-MySQL-PHP (WAMP) platform and is tested on the Ali Cloud platform...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29182591/ecg-signal-de-noising-and-baseline-wander-correction-based-on-ceemdan-and-wavelet-threshold
#17
Yang Xu, Mingzhang Luo, Tao Li, Gangbing Song
A novel electrocardiogram (ECG) signal de-noising and baseline wander correction method based on complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and wavelet threshold is proposed. Although CEEMDAN is based on empirical mode decomposition (EMD), it represents a significant improvement of the original EMD by overcoming the mode-mixing problem. However, there has been no previous study on using CEEMDAN to de-noise ECG signals, to the authors' best knowledge. In the proposed method, the original noisy ECG signal is decomposed into a series of intrinsic mode functions (IMFs) sorted from high to low frequency by CEEMDAN...
November 28, 2017: Sensors
https://www.readbyqxmd.com/read/29171116/impact-of-weight-loss-on-ablation-outcome-in-obese-patients-with-longstanding-persistent-atrial-fibrillation
#18
Sanghamitra Mohanty, Prasant Mohanty, Veronica Natale, Chintan Trivedi, Carola Gianni, J David Burkhardt, Javier E Sanchez, Rodney Horton, G Joseph Gallinghouse, Richard Hongo, Salwa Beheiry, Amin Al-Ahmad, Luigi Di Biase, Andrea Natale
AIMS: This study investigated the impact of weight loss in longstanding persistent (LSPAF) patients undergoing catheter ablation (CA). METHODS: Ninety consecutive obese LSPAF patients were approached; 58 volunteered to try weight loss interventions for up to 1 year (Group 1), while 32 patients declined weight loss interventions and were included as a control (Group 2). Both groups remained on antiarrhythmic drugs. If they continued to experience AF, CA was performed...
November 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29170866/registration-of-angiographic-image-on-real-time-fluoroscopic-image-for-image-guided-percutaneous-coronary-intervention
#19
Dongkue Kim, Sangsoo Park, Myung Ho Jeong, Jeha Ryu
PURPOSE: In percutaneous coronary intervention (PCI), cardiologists must study two different X-ray image sources: a fluoroscopic image and an angiogram. Manipulating a guidewire while alternately monitoring the two separate images on separate screens requires a deep understanding of the anatomy of coronary vessels and substantial training. We propose 2D/2D spatiotemporal image registration of the two images in a single image in order to provide cardiologists with enhanced visual guidance in PCI...
November 23, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29164383/image-quality-and-radiation-dose-of-coronary-ct-angiography-performed-with-whole-heart-coverage-ct-scanner-with-intra-cycle-motion-correction-algorithm-in-patients-with-atrial-fibrillation
#20
Daniele Andreini, Gianluca Pontone, Saima Mushtaq, Maria Elisabetta Mancini, Edoardo Conte, Marco Guglielmo, Valentina Volpato, Andrea Annoni, Andrea Baggiano, Alberto Formenti, Valentina Ditali, Marco Perchinunno, Cesare Fiorentini, Antonio L Bartorelli, Mauro Pepi
OBJECTIVES: To evaluate image quality, coronary evaluability and radiation exposure of coronary CT angiography (CCTA) performed with whole-heart coverage cardiac-CT in patients with atrial fibrillation (AF). MATERIALS AND METHODS: We prospectively enrolled 164 patients with AF who underwent a clinically indicated CCTA with a 16-cm z-axis coverage scanner. In all patients CCTA was performed using prospective ECG-triggering with targeted RR interval. We evaluated image quality, coronary evaluability and effective dose (ED)...
November 21, 2017: European Radiology
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