نتایج جستجو برای: electrocardiogram artifact

تعداد نتایج: 32872  

Journal: :international journal of high risk behaviors and addiction 0
gholamreza komeili department of physiology, school of medicine, university of medical sciences, zahedan, ir iran; department of physiology, school of medicine, university of medical sciences, zahedan, ir iran. tel: +98-5413414575, fax: +98-5413414561 sima nabizadeh sarabandi department of english, school of medicine, university of medical sciences, zahedan, ir iran

background the increasing use of mobile phones in recent years has caused concerns about the effects of electromagnetic waves of mobile phonesonhuman biological processes. objectives this study was conducted in order to survey the effects of mobile electromagnetic waves on electro cardiogram parameters as heart rate, tp segment, pr interval, time of qrs and t waves, and voltage of r wave. patie...

2015
Antonio Lanata Andrea Guidi Paolo Baragli Gaetano Valenza Enzo Pasquale Scilingo Leontios Hadjileontiadis

This study reports on a novel method to detect and reduce the contribution of movement artifact (MA) in electrocardiogram (ECG) recordings gathered from horses in free movement conditions. We propose a model that integrates cardiovascular and movement information to estimate the MA contribution. Specifically, ECG and physical activity are continuously acquired from seven horses through a wearab...

2016
Vandana Roy Megha Gupta

this paper presents a novel technique for removing the artifacts from the Electro-Encephalo-Gram (EEG) signals. EEG signals are influenced by different characteristics, like line interference, EOG (ElectroOculogram) and ECG (Electrocardiogram). The elimination of artifact from scalp EEGs is of substantial significance for both the automated and visual examination of underlying brainwave actions...

2018
Thorsten Lewalter

Aside from the discovery of the cardiac conduction system (Table 1) and advancements in the electrotherapy of cardiac arrhythmias (Table 2), the development of electrocardiography was the key issue for a more detailed understanding of arrhythmogenesis as a cause and correlate of cardiac disorders (Table 3). After the first documentation of a cardiac action potential by Rudolph von Koelliker and...

2014
Monika Sheoran Sanjeev Kumar Amod Kumar

Electroencephalogram (EEG) signals are having very small amplitudes and because of that they can be easily contaminated by different Artifacts. The presence of artifacts makes the analysis of EEG difficult for clinical evaluation. The major types of artifacts that affect the EEG are Power Line noise, eye movements, Electromyogram (EMG), and Electrocardiogram (ECG). Out of these artifacts Power ...

Journal: :Journal of computer assisted tomography 2008
Deepak Bharkhada Hengyong Yu Ge Wang

Motion artifact is still a major issue in cardiac computed tomography because the current motion correction and electrocardiogram gating techniques have not fully addressed this problem. The image quality can be significantly improved by using information about the actual state of the heart and an exact reconstruction algorithm. We propose to extend a cardiac computed tomographic technique, usi...

2011
Carmen Vidaurre Tilmann Heinrich Sander Alois Schlögl

BioSig is an open source software library for biomedical signal processing. The aim of the BioSig project is to foster research in biomedical signal processing by providing free and open source software tools for many different application areas. Some of the areas where BioSig can be employed are neuroinformatics, brain-computer interfaces, neurophysiology, psychology, cardiovascular systems, a...

2011
Jian Xu Kellyanne Mcgorty Ruth Lim Mary Bruno Monvadi Srichai Daniel Kim Daniel K Sodickson

PURPOSE To evaluate the feasibility of performing single breathhold three-dimensional (3D) thoracic noncontrast MR angiography (NC-MRA) using highly accelerated parallel imaging. MATERIALS AND METHODS We developed a single breathhold NC MRA pulse sequence using balanced steady state free precession (SSFP) readout and highly accelerated parallel imaging. In 17 subjects, highly accelerated nonc...

2004

here are two predominant types of noise T that contaminate the electrocardiogram (ECG) acquired during a stress test: the baseline wander noise (BW) and electrode motion artifact, and electromyogram-induced noise (EMG) [ 11. BW noise is at a lower frequency, caused by respiration and motion of the subject or the leads. The frequency components of BW noise are usually below 0.5 Hz, and extend in...

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