A Study To Determine The Accuracy Of A Computerized Algorithm For Interpretation Of EEG's (original) (raw)
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Clinical Finding of Electroencephalographic (EEG) Data in Adults: A Retrospective study
Journal of Shaheed Suhrawardy Medical College, 2017
Background: Electroencephalography (EEG) is the first and only real-time monitor of epileptic seizures, and is a powerful measure of cerebral function in the seriously ill. Objective: The purpose of this study was to see the common conditions for doing EEG. Methods: This study was performed retrospectively by collecting and reviewing the electro-clinical information of the adult patients to whom EEGs were done at the 'Central Hospital' laboratory. Clinical problems were categorized into seizures, fainting attacks, headache, giddiness, vertigo, stroke, suicidal tendency, sudden aggressiveness and head injury. Routine EEGs were performed for 30 minutes. EEG findings were categorized as normal for the age, localized or generalized epileptiform discharges, non-epileptogenic dysfunction. Result: In total 53 adult patients 34% population had fainting attacks, 28% had seizures, 10% had stroke and 28% had complaint related to behavior, suicidal tendency, headache and post head injury problems. EEG was normal in 60%. Conclusion: EEG is advised for diverse conditions. The proportion of epileptic patients is small, although this is the principal indication for doing routine EEG. [
IP Innovative Publication Pvt. Ltd., 2017
Introduction: Electroencephalogram [EEG] is one of the best and only device for epileptic seizures, which measures cerebral function. It is a convenient and relatively inexpensive way to demonstrate the physiological manifestations of abnormal neuronal excitability that underlie epilepsy. Aim: To collect the common conditions of EEG data retrospectively and interpret the clinical findings in adult patients and children. Materials and Method: Retrospective study, by collecting and reviewing 829 patients and their EEG reports in children and adult conducted at central research laboratory. Presenting clinical complaints were epilepsy, syncope, Headache, giddiness, viral brain infections, psychiatric conditions, alcohol withdrawal syndrome, global developmental delay. The EEG results were categorized as normal EEG and epileptiform discharges in all patients, while separate analysis was done in patients with epilepsy.
Using EEG in a Consultative Role
Seminars in Neurology, 2003
The electroencephalogram (EEG) is a long-used tool assisting health care providers with the diagnosis, management, and treatment of various neurological disorders. This article highlights several scenarios in which a consultant may utilize the routine EEG in managing specific neurological cases. Eight case scenarios from a tertiary referral hospital are presented for the reader's consideration. Scenarios selected are new-onset seizures, encephalopathy, syncope, dementia, brain death, hypoxic-ischemic encephalopathy, status epilepticus, and migraine. A history in each condition is presented and is followed by a discussion of how useful an EEG may be in these specific situations. These eight cases highlight specific learning points where the EEG may be useful and how it can be practically incorporated into care of patients. Understanding how the EEG may be useful in the presented cases will allow the efficient and effective use of the EEG in similar clinical scenarios.
Clinical Neurophysiology Practice, 2017
This glossary includes the terms most commonly used in clinical EEG. It is based on the previous proposals (Chatrian et al., 1974; Noachtar et al., 1999) and includes terms necessary to describe the EEG and to generate the EEG report. All EEG phenomena should be described as precisely as possible in terms of frequency, amplitude, phase relation, waveform, localization, quantity, and variability of these parameters (Brazier et al., 1961). The description should be independent of the recording parameters such as amplification, montages, and computer program/display. Biological and technical artifacts that interfere with an adequate EEG interpretation should either be eliminated or, if this is not possible, be noted in the description. The EEG report should follow a standard format that includes a factual description and a clinical interpretation of the EEG record. The interpretation of the EEG requires knowledge of the patient's age, past medical and medication history, their clinical condition during the EEG, particularly level of consciousness/vigilance and ability to cooperate. The EEG interpretation summarizes the results of the EEG and gives a clinical interpretation in light of the diagnosis and the questions posed by the referring physician. The terminology of the EEG interpretation should follow common neurological and clinical practice and use terms understandable to other physicians not specialized in EEG. A proposal for the EEG report form is given in Appendix A.
Diagnostic Yield of Electroencephalography in a General Inpatient Population
Mayo Clinic Proceedings, 2013
Objective: To determine the frequency and clinical predictors of seizures and markers of epileptiform activity in a nonecritically ill general inpatient population. Patients and Methods: We performed a retrospective cohort study of patients 18 years and older who underwent inpatient electroencephalography (EEG) between January 1, 2005, and December 31, 2010, for an indication of spells or altered mental status. The EEGs and reports were reviewed for ictal activity, interictal epileptiform abnormalities, and nonepileptiform abnormalities. Demographic and clinical data were gathered from the electronic medical record to determine seizure predictors. Results: Of 2235 patients screened, 1048 met the inclusion criteria, of which 825 (78.7%) had an abnormal EEG finding. Seizures occurred in 78 of 1048 patients (7.4%), and interictal epileptiform discharges were noted in 194 of 1048 patients (18.5%). An intracranial mass and spells as the indication for the EEG were independently associated with the group of patients experiencing seizures in a multivariate logistic regression model (adjusted for age, sex, EEG indication, intracranial mass, stroke, and history of epilepsy). Ninety-seven percent of patients (69 of 71) experienced their first seizure within 24 hours of monitoring, and the presence of seizures was associated with a lower likelihood of being discharged (odds ratio, 0.45; 95% CI, 0.27-0.76). Conclusion: Seizures occurred at a high frequency in hospitalized patients with spells and altered mental status. The EEG may be an underused investigative tool in the hospital with the potential to identify treatable causes of these common disorders.
American Clinical Neurophysiology Society: EEG Guidelines Introduction
The Neurodiagnostic journal, 2016
This revision to the EEG Guidelines is an update incorporating current EEG technology and practice. "Standards of practice in clinical electroencephalography" (previously Guideline 4) has been removed. It is currently undergoing revision through collaboration among multiple medical societies and will become part of "Qualifications and Responsibilities of Personnel Performing and Interpreting Clinical Neurophysiology Procedures." The remaining guidelines are reordered and renumbered.
Practical Recommendations for Conducting an EEG Study in a Neurophysiological Laboratory
Advances in Electroencephalography and Brain Connectome
The method of electroencephalography is an accurate and objective method of recording the bioelectrical activity of the brain, used both in scientific research and in clinical practice. However, achieving a high-quality result requires a lot of preparatory work. This chapter describes the technology for conducting electroencephalographic studies, their subsequent analysis, and presentation of results that are understandable to both a specialist neurophysiologist and a practicing neurologist. You will also find a description of the organization of the EEG study, the choice of scenario, functional tests, and the basics of forming a medical report. We will also consider individual issues of organizing an EEG study in people who have had a stroke, and multichannel and functional EEG studies.
The utility of ambulatory electroencephalography in routine clinical practice: A critical review
Epilepsy Research, 2013
Over the last four decades, ambulatory electroencephalography (EEG) has evolved to be a useful tool in the diagnosis of epilepsy and certain nonepileptic paroxysmal disorders. Most of the initial technological drawbacks of ambulatory EEG have been circumvented by incorporating digital and computer technology. It appears superior to routine EEG in capturing interictal abnormalities particularly in relation to natural sleep, circadian variations and the patient's typical daily lifestyle. The role of ambulatory EEG in studying seizures and nonepileptic paroxysmal events remains to be defined by targeted research. It perhaps is an underutilized tool and more research is needed to expand the horizon of ambulatory EEG applications in clinical practice. Crown
Comments on "The Clinical EEG-A Search for a Buried Message
IEEE Transactions on Biomedical Engineering, 2000
It is noted that a meaningful method of extracting information from the EEG must take into account the current understanding of the origin of scalp-recorded brain electrical activity, as well as many application-specific details. In previous studies which considered these points, useful information has been derived from EEG recordings.