K – Shrinkage Function for ECG Signal Denoising

AbstractECG signals is a graphical way of recording the electrical actions of the heart for the various diagnostic purposes. ECG signals are affected by various noises such as Electrode Contact, Baseline Wandering, Motion artifact, Power-line interference, Muscle Contractions, and Electrosurgical noise during data acquisition. Denoising is a technique which is used for removing the noise in ECG signals which keeps the useful information. In this paper, a new category of Wavelet shrinkage methods is proposed. The white Gaussian noise is mixed with the ECGs for simulation and tested with the new class of shrinkage function and is compared with the other wavelet shrinkage functions such as hard and soft shrinkage. The performance measures such as Signal to Noise Ratio (SNR) and Percent Root mean – square Difference (PRD) etc. are used to examine the performance of various shrinkage functions. The experimental result shows that it gives better MSE over conventional shrinkage functions.
Source: Journal of Medical Systems - Category: Information Technology Source Type: research

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Chen For long-term and more convenience electrocardiograph (ECG) monitoring, an active- electrode-based ECG monitoring system, which can measure ECG through clothes, is proposed in this paper. The hardware of the system includes active electrodes, signal processing and data transmission modules and the software mainly includes a denoising algorithm based on empirical mode decomposition (EMD). Then the proposed system was verified using the comparison of the ECG signals measured synchronously by active electrodes and Ag/AgCl electrodes. In addition, three flexible materials, including conductive textile, copper foil ta...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
Publication date: Available online 15 August 2019Source: American Heart JournalAuthor(s): Fatima Ali-Ahmed, Frederik Dalgaard, Sana M. Al-KhatibAbstractMyocarditis is a major cause of sudden cardiac death (SCD) and dilated cardiomyopathy (DCM) in young adults. Cardiac magnetic resonance (CMR) is the established tool for the diagnosis of myocarditis, and late gadolinium enhancement (LGE) detected on CMR imaging is the strongest independent predictor of SCD, all-cause mortality, and cardiac mortality. Several other factors have been associated with SCD or cardiac transplantation including New York Heart Association functiona...
Source: American Heart Journal - Category: Cardiology Source Type: research
Authors: Guo S, Zhou L, Wang R, Lv Z, Xu H, Han B, Korantzopoulos P, Hu F, Liu T Abstract The present study reports on a family with two members affected by Danon disease but having different phenotypes. The clinical manifestations of Danon disease include cardiomyopathy, skeletal myopathy and different degrees of intellectual disability that varies greatly among patients. The present case study reports on two siblings, an older sister and a younger brother, with Danon disease from an affected pedigree, presenting with distinctly different phenotypes. The sister was diagnosed with dilated cardiomyopathy at the age ...
Source: Experimental and Therapeutic Medicine - Category: General Medicine Tags: Exp Ther Med Source Type: research
ConclusionsNusinersen demonstrated a favorable safety profile in children with symptomatic infantile- and later-onset SMA. Most reported AEs and serious AEs were consistent with the nature and frequency of events typically seen with SMA or in the context of lumbar puncture procedures.RegistrationNCT01494701, NCT01703988, NCT01839656, NCT02193074, NCT02292537, NCT01780246, NCT02052791.
Source: CNS Drugs - Category: Neurology Source Type: research
Human Gene Therapy,Volume 30, Issue 8, Page 1035-1035, August 2019.
Source: Human Gene Therapy - Category: Genetics & Stem Cells Source Type: research
Condition:   ST Elevated Myocardial Infarction Intervention:   Device: Alivecor Heart Monitor Sponsor:   INTEGRIS Baptist Medical Center Completed
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
We present a patient who was admitted for carotid endarterectomy due to tight carotid stenosis and recent amaurosis fugax. His medical history included significant coronary artery disease with stable angina pectoris, hypertension with wide pulse pressure, chronic renal failure, and anemia. During preparation for surgery, the patient developed type 2 myocardial infarction with prolonged chest pain, ST depressions on electrocardiogram, and significant troponin elevations. The patient posed a serious clinical dilemma whether to continue with surgery despite the type 2 myocardial infarction or postpone the surgery. We discuss ...
Source: A&A Case Reports - Category: Anesthesiology Tags: Case Reports Source Type: research
Introduction: Sudden cardiac death is a rare cause of death in young athletes. Current screening techniques include history and physical exam (H and P), with or without an electrocardiogram (ECG). Adding point of care cardiac ultrasound has demonstrated benefits, but there is limited data about implementing this technology. We evaluated the feasibility of adding ultrasound to preparticipation screening for collegiate athletes.Methods: We prospectively enrolled 42 collegiate athletes randomly selected from several sports. All athletes were screened using a 14-point H and P based on 2014 American College of Cardiology (ACC) ...
Source: Western Journal of Emergency Medicine - Category: Emergency Medicine Source Type: research
We report a patient with severe VDD that resulted in TdP and cardiac arrest. Post-resuscitation work up illustrated prolonged QTc interval of 620 ms, significant hypocalcemia, and severe VDD of 4 (normal 30–80) ng/mL. After high dose vitamin D/calcium supplements, repeat electrocardiogram revealed normal QTc interval of 423 ms. During hospitalization, the patient suffered no additional arrhythmias and QTc continued to be normal.
Source: Journal of Cardiology Cases - Category: Cardiology Source Type: research
Written by Pendell MeyersA male in his early 50s presented with waxing and waning chest pain starting at rest. He had multiple cardiovascular risk factors and the EM physician strongly suspected ACS.Here is his initial ECG:What do you think?Sinus rhythm-STE in V1-V5, possibly a tiny amount in V6, and small amount in I and aVL, and II-Reciprocal STD (although perhaps isoelectric at J point, immediate STD after the J point) with very ischemic appearance in lead III (down-up T-wave is strongtly suggestive)-Large T-waves in V2-V4, which may be either a normal variant or hyperacute-Very tiny Q wave in lead V2, as well as V6, I,...
Source: Dr. Smith's ECG Blog - Category: Cardiology Authors: Source Type: blogs
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