DATE OF STUDY: MM/DD/YYYY
INDICATION FOR STUDY: The patient is a (XX)-year-old child who is being evaluated for his microcephaly and possibly seizure. He is described as awake and cooperative.
TECHNIQUE AND FINDINGS: This is a multichannel digital EEG recording using the international 10-20 placement system. The resting record is fairly well organized and symmetric. A dominant posterior rhythm is seen. It consists of a 10 hertz, 20-70 microvolt alpha rhythm. This attenuates with eye opening. During drowsiness, there is mild attenuation and slowing of the background rhythm. Vertex sharp transients, K-complexes, and sleep spindles were recorded during Stage II sleep. Hyperventilation was not performed.
Photic stimulation did not significantly alter the background rhythm. There was noted the presence of occasional left temporoparietal spike discharges. This, at times, was associated with some movement and muscle artifact and was difficult to discern. However, no clinical seizure activity or electrographic seizures were recorded.
IMPRESSION: This is an abnormal EEG recording because of the presence of left temporoparietal epileptiform discharges. These findings can be consistent with a diagnosis of seizures with a focal onset in the left temporoparietal region. Clinical correlation is suggested as to the significance of this EEG finding.
DATE OF STUDY: MM/DD/YYYY
INDICATION FOR STUDY: This is a (XX)-year-old right-handed African-American male admitted with respiratory failure, on ventilator, altered mental status, and unresponsiveness.
TECHNIQUE: Routine 18-channel digital EEG was obtained to rule out any seizure activity or focal abnormalities.
FINDINGS: The patient was essentially unresponsive throughout the study. Background rhythm shows poorly organized, low voltage, up to 6 hertz theta activity. No spike-and-wave discharges or any lateralizing abnormalities were seen. Photic stimulation did not produce any abnormalities. Frequent EMG artifacts were seen.
IMPRESSION: Abnormal EEG because of generalized slowing in the background rhythm indicative of diffuse cortical dysfunction of moderate degree. This may be consistent with encephalopathy, severe metabolic, ischemic, or infective in origin or severe cortical atrophy and dementia. No epileptiform discharges or any other paroxysmal activities or focal abnormalities were seen. Clinical correlation is recommended.
DATE OF STUDY: MM/DD/YYYY
INDICATION FOR STUDY: The patient is a (XX)-year-old woman with a history of syncope. This study is done to evaluate for possible seizure. She is described as awake, cooperative, and occasionally restless.
TECHNIQUE AND FINDINGS: This is a multichannel digital EEG recording using the international 10-20 placement system. The resting record is fairly well organized and symmetric. A dominant posterior rhythm is seen and consists of a 6 hertz, 20 to 70 microvolt beta rhythm. This attenuates with eye opening. During drowsiness, there is mild attenuation and slowing of the background rhythm. Stage II sleep was not achieved. Hyperventilation was not performed.
Photic stimulation did not significantly alter the background rhythm. No focal slowing occurred. No epileptiform discharges occurred. Prominent muscle and movement artifact noted in the frontal regions. However, no focal slowing or epileptiform discharges occurred.
IMPRESSION: This is an abnormal EEG recording because of the presence of mild diffuse background slowing. This is a nonspecific finding and can be seen in several conditions, including hypoxic, ischemic, and metabolic encephalopathies, postictal states, post-traumatic injury, and dementia can also produce similar findings. Clinical correlation is suggested as to the etiology of these findings.
