A review of electrocardiogram filtering.
Summary of "A review of electrocardiogram filtering."
Analog filtering and digital signal processing algorithms in the preprocessing modules of an electrocardiographic device play a pivotal role in providing high-quality electrocardiogram (ECG) signals for analysis, interpretation, and presentation (display, printout, and storage). In this article, issues relating to inaccuracy of ECG preprocessing filters are investigated in the context of facilitating efficient ECG interpretation and diagnosis. The discussion covers 4 specific ECG preprocessing applications: anti-aliasing and upper-frequency cutoff, baseline wander suppression and lower-frequency cutoff, line frequency rejection, and muscle artifact reduction. Issues discussed include linear phase, aliasing, distortion, ringing, and attenuation of desired ECG signals. Due to the overlapping power spectrum of signal and noise in acquired ECG data, frequency selective filters must seek a delicate balance between noise removal and deformation of the desired signal. Most importantly, the filtering output should not adversely impact subsequent diagnosis and interpretation. Based on these discussions, several suggestions are made to improve and update existing ECG data preprocessing standards and guidelines.
This article was published in the following journal.
Name: Journal of electrocardiology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20851409
- DOI: http://dx.doi.org/10.1016/j.jelectrocard.2010.07.007
We review the principles and applications of statistical filtering in multichannel fluorescence microscopy. This alternative approach to separation of signals from individual fluorophore populations h...
A properly interpreted electrocardiogram (ECG) provides important information and is an inexpensive and easy test to perform. It continues to be the method of choice for the diagnosis of arrhythmias. ...
To study different aspects of visual function, macular changes, and subjective differences between the eye with an ultraviolet (UV) and blue-light filtering intraocular lens (IOL) and the fellow eye w...
Electrocardiogram (ECG) registered in acute period of myocardial infarction (MI) can be used not only for diagnostic purposes, but also for prediction of extent of myocardial injury and assessment of ...
To review the available evidence establishing the validity of adding electrocardiogram to the preparticipation cardiac screening in athletes.
To compare the effect on blood retinal barrier disruption 3 and 12 months after implantation of either a blue light filtering intraocular lens(blue-filtering IOL) or an ultraviolet light f...
To determine whether postoperative subconjunctival injections of 5-fluorouracil (5-FU) increase the success rate of filtering surgery in patients at high risk for failure after standard gl...
The use of ocular compression and suture release have helped to improve the safety and decrease the risks of glaucoma filtering surgery. This study looks at the decrease in intraocular pr...
To measure colour vision in patients with a blue light filtering lens implant in one eye and non-tinted implant in the other eye (and compared this group with a control group with bilatera...
Visible-light-filtering IOLs are implanted increasingly often in cataract surgery. Several studies examined the effect of light-filters on contrast and colour vision. However, the study ou...
Medical and Biotech [MESH] Definitions
Size, shape, and length of ECG parts, including waves, intervals, duration, and segments. Some heart-related conditions can be characterized by specific set of electrocardiogram patterns.
Review of the medical necessity of hospital or other health facility admissions, upon or within a short time following an admission, and periodic review of services provided during the course of treatment.
Formal programs for assessing drug prescription against some standard. Drug utilization review may consider clinical appropriateness, cost effectiveness, and, in some cases, outcomes. Review is usually retrospective, but some analysis may be done before drugs are dispensed (as in computer systems which advise physicians when prescriptions are entered). Drug utilization review is mandated for Medicaid programs beginning in 1993.
Organizations representing designated geographic areas which have contracts under the PRO program to review the medical necessity, appropriateness, quality, and cost-effectiveness of care received by Medicare beneficiaries. Peer Review Improvement Act, PL 97-248, 1982.
Published materials which provide an examination of recent or current literature. Review articles can cover a wide range of subject matter at various levels of completeness and comprehensiveness based on analyses of literature that may include research findings. The review may reflect the state of the art. It also includes reviews as a literary form.