A preliminary study of the effect of electrode placement in order to define a suitable location for two electrodes and obtain sufficiently reliable ECG signals when monitoring with wireless system

2012 ◽  
Author(s):  
Hyung Wook Noh ◽  
Yongwon Jang ◽  
I. B. Lee ◽  
Yoonseon Song ◽  
Ji-Wook Jeong ◽  
...  
Keyword(s):  
Electrode Placement ◽  
Wireless System ◽  
Ecg Signals ◽  
Preliminary Study ◽  
Suitable Location

scholarly journals Neuromuscular, Perceptual, and Temporal Determinants of Movement Patterns in Wheelchair Fencing: Preliminary Study

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zbigniew Borysiuk ◽  
Tadeusz Nowicki ◽  
Katarzyna Piechota ◽  
Monika Błaszczyszyn
Keyword(s):  
Latissimus Dorsi ◽  
Muscle Activation ◽  
Movement Pattern ◽  
Intergroup Difference ◽  
Wireless System ◽  
Sensory Stimuli ◽  
Accelerometer Signal ◽  
Postural Muscle ◽  
Preliminary Study

The objective of the present study was to determine the structure of the movement pattern performed during a wheelchair fencing lunge that is executed in response to visual and sensory stimuli. In addition, a comparison was made between fencers in the categories A and B of disability. In addition, the analysis involved the correlation between the duration of the sensorimotor response and the value of the bioelectric signal recorded in selected muscles. Seven Paralympic team athletes specializing in wheelchair fencing (3 in category A and 4 in category B) participated in the research. The fencers perform at international level competitions and are multiple medalists of the Paralympic Games. In the study, a wireless system for sEMG and accelerometer signal measurement was employed to test the intervals between the initiation of the lunge attack and its termination defined by the touch of the weapon on the coach’s torso. The electrodes were placed on 9 key muscles responsible for the effectiveness of the executed attack: DEL, TRI, BC, ECR FCR, LD, and EAO. The significant intergroup difference in the muscle activation was found to be 0.333 s for category A fencers and 0.522 s for category A fencers at p=0.039 applies to the latissimus dorsi (LD LT) muscle, which demonstrates its significance as a postural muscle in the structure of the examined movement pattern. In terms of the values of EMG, a tendency for higher MVC (%) values in most muscles for category A competitors was recorded. The latissimus dorsi (DL RT) muscle with an intergroup difference of MVC-114.63 for cat. A and 67.50 for cat. B at p=0.039 turned out to play a significant role. The results prove the role of postural muscles: external abdominal oblique and latissimus dorsi on the effectiveness of the attacks executed in wheelchair fencing.

Automated Neural Network Based Classification of HRV and ECG Signals of Smokers: A Preliminary Study

2015 ◽  
pp. 271-279 ◽  
Author(s):  
Suraj Kumar Nayak ◽  
Ipsita Panda ◽  
Biswajeet Champaty ◽  
Niraj Bagh ◽  
Kunal Pal ◽  
...  
Keyword(s):  
Neural Network ◽  
Ecg Signals ◽  
Preliminary Study

A Preliminary Study on Precision Image Guidance for Electrode Placement in an EEG Study

2017 ◽  
Vol 31 (2) ◽  
pp. 174-185 ◽  
Author(s):  
Sangseo Jeon ◽  
Jongho Chien ◽  
Chanho Song ◽  
Jaesung Hong
Keyword(s):  
Image Guidance ◽  
Electrode Placement ◽  
Preliminary Study

scholarly journals A Preliminary Study about the Music Influence on EEG and ECG Signals

2018 ◽  
Author(s):  
Manuel Merino-Monge ◽  
Isabel M. Gómez-González ◽  
Juan A. Castro-García ◽  
Alberto J. Molina-Cantero ◽  
Roylán Quesada-Tabares
Keyword(s):  
Ecg Signals ◽  
Preliminary Study

scholarly journals ECG Electrode Placements for Magnetohydrodynamic Voltage Suppression

2018 ◽  
Vol 4 (7) ◽  
pp. 94
Author(s):  
T. Gregory ◽  
John Oshinski ◽  
Zion Tse
Keyword(s):  
Healthy Subjects ◽  
Human Subjects ◽  
Vector Model ◽  
Electrode Placement ◽  
Qrs Complex ◽  
Ecg Signals ◽  
Qrs Complex Detection ◽  
Group 2 ◽  
Magnetic Resonance Imaging Mri ◽  
Group 1

This study aims to investigate a set of electrocardiogram (ECG) electrode lead locations to improve the quality of four-lead ECG signals acquired during magnetic resonance imaging (MRI). This was achieved by identifying electrode placements that minimized the amount of induced magnetohydrodynamic voltages (VMHD) in the ECG signals. Reducing VMHD can improve the accuracy of QRS complex detection in ECG as well as heartbeat synchronization between MRI and ECG during the acquisition of cardiac cine. A vector model based on thoracic geometry was developed to predict induced VMHD and to optimize four-lead ECG electrode placement for the purposes of improved MRI gating. Four human subjects were recruited for vector model establishment (Group 1), and five human subjects were recruited for validation of VMHD reduction in the proposed four-lead ECG (Group 2). The vector model was established using 12-lead ECG data recorded from Group 1 of four healthy subjects at 3 Tesla, and a gradient descent optimization routine was utilized to predict optimal four-lead ECG placement based on VMHD vector alignment. The optimized four-lead ECG was then validated in Group 2 of five healthy subjects by comparing the standard and proposed lead placements. A 43.41% reduction in VMHD was observed in ECGs using the proposed electrode placement, and the QRS complex was preserved. A VMHD-minimized electrode placement for four-lead ECG gating was presented and shown to reduce induced magnetohydrodynamic (MHD) signals, potentially allowing for improved cardiac MRI physiological monitoring.

scholarly journals Violence Detection From ECG Signals: A Preliminary Study 

2017 ◽  
pp. 7-13 ◽  
Author(s):  
Hany Ferdinando ◽  
Liang Ye ◽  
Tian Han ◽  
Zhu Zhang ◽  
Guobing Sun ◽  
...  
Keyword(s):  
Ecg Signals ◽  
Violence Detection ◽  
Preliminary Study

Use of a wireless system to measure invasive arterial blood pressure in ponies - preliminary study

2009 ◽  
Vol 36 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Carolina H Ricco ◽  
Jane E Quandt ◽  
Roberto E Novo ◽  
Maria Killos ◽  
Lynelle Graham
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Wireless System ◽  
Arterial Blood ◽  
Preliminary Study

The Ultrastructure of Metastatic Human Mammary Carcinoma After Prolonged Estrogen Therapy

1967 ◽  
Vol 25 ◽  
pp. 180-181
Author(s):  
John H.L. Watson ◽  
John L. Swedo ◽  
R.W. Talley
Keyword(s):  
Mammary Carcinoma ◽  
Osmium Tetroxide ◽  
Estrogen Therapy ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Human Mammary Carcinoma ◽  
Surgical Biopsy ◽  
Lead Hydroxide ◽  
Preliminary Study ◽  
Hormonal Therapies

A preliminary study of human mammary carcinoma on the ultrastructural level is reported for a metastatic, subcutaneous nodule, obtained as a surgical biopsy. The patient's tumor had responded favorably to a series of hormonal therapies, including androgens, estrogens, progestins, and corticoids for recurring nodules over eight years. The pertinent nodule was removed from the region of the gluteal maximus, two weeks following stilbestrol therapy. It was about 1.5 cms in diameter, and was located within the dermis. Pieces from it were fixed immediately in cold fixatives: phosphate buffered osmium tetroxide, glutaraldehyde, and paraformaldehyde. Embedment in each case was in Vestopal W. Contrasting was done with combinations of uranyl acetate and lead hydroxide.

Fine structure of early degenerating myofibers in the tibialis anterior of young ‘MDX’ mouse

1988 ◽  
Vol 46 ◽  
pp. 322-323
Author(s):  
H.D. Geissinger ◽  
C.K. McDonald-Taylor
Keyword(s):  
Fine Structure ◽  
Muscle Regeneration ◽  
Tibialis Anterior ◽  
Genetic Defect ◽  
Mdx Mouse ◽  
Mdx Mice ◽  
Histopathological Changes ◽  
Electron Microscopic ◽  
Dystrophic Mouse ◽  
Preliminary Study

A new strain of mice, which had arisen by mutation from a dystrophic mouse colony was designated ‘mdx’, because the genetic defect, which manifests itself in brief periods of muscle destruction followed by episodes of muscle regeneration appears to be X-linked. Further studies of histopathological changes in muscle from ‘mdx’ mice at the light microscopic or electron microscopic levels have been published, but only one preliminary study has been on the tibialis anterior (TA) of ‘mdx’ mice less than four weeks old. Lesions in the ‘mdx’ mice vary between different muscles, and centronucleation of fibers in all muscles studied so far appears to be especially prominent in older mice. Lesions in young ‘mdx’ mice have not been studied extensively, and the results appear to be at variance with one another. The degenerative and regenerative aspects of the lesions in the TA of 23 to 26-day-old ‘mdx’ mice appear to vary quantitatively.

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