Table of Contents
Are triphasic waves seizures?
Triphasic sharp waves have been described in isolated nonconvulsive seizures (NCS) and in nonconvulsive status epilepticus (NCSE).
Can you have an abnormal EEG without having epilepsy?
This means that sometimes the EEG is described as ‘abnormal’ (that is ‘not normal’ brain activity) but does not ‘prove’ that the person has epilepsy. To complicate this further, some people have ‘abnormal’ EEGs but do not have epilepsy.
What are the typical EEG findings associated with encephalopathy?
Hepatic encephalopathy is encountered in patients with liver failure or insufficiency from any cause. The EEG changes in the beginning commonly include slowing of the posterior dominant rhythm, followed by a gradual slowing of the background with the appearance of theta and delta activity.
What do triphasic waves mean on EEG?
Triphasic waves are abnormal electroencephalogram (EEG) waveforms seen with a multitude of clinical conditions including encephalopathy and structural brain lesions. They are non-specific, high amplitude, sharply contoured waves with a unique morphology.
What causes triphasic waves EEG?
The 3 most common causes of TWE are hepatic encephalopathy , renal failure, and anoxic injury. Other causes of TWs include the following: Hepatic coma/failure. Metabolic abnormalities such as hypernatremia, hyponatremia, hypercalcemia, and hypoglycemia.
What are triphasic waves?
Triphasic waves are abnormal electroencephalogram (EEG) waveforms seen in association with multiple clinical conditions, including encephalopathy and structural brain lesions, among others. They are nonspecific, high amplitude sharp/sharply contoured waves with three distinctive phases.
Are PLEDs seizures?
Periodic lateralized epileptiform discharges (PLEDs), an EEG pattern that is highly correlated with seizures, may represent an ictal pattern in some patients, but in other patients PLEDs persist despite the absence of seizures or after seizures have been controlled by anti-epileptic drugs.
What do triphasic waves indicate?
Should epileptiform discharges be treated?
Although there is no solid evidence for or against treatment of EDs, a non-evidence based practical approach is suggested. EDs in otherwise asymptomatic individuals should not be treated as the risks of treatment probably outweigh its dubious benefits.
What is difference between epileptic and non-epileptic seizure?
Most common are epileptic seizures, or seizures caused by sudden abnormal electrical discharges in the brain. Non-epileptic seizures, on the other hand, are not accom- panied by abnormal electrical discharges. They have been previously called pseudoseizures, but that term is mislead- ing.
How can you tell the difference between an epileptic and a non-epileptic seizure?
Although some causes are the same between epileptic and non-epileptic seizures, the difference your doctor will look for is whether the brain’s electrical activity is being disrupted. Results from an EEG will look differently if epilepsy is not the cause.
Is epileptiform activity a seizure?
Both classes of epileptic seizures can occur at all ages. An epileptiform activity in EEG signals including spikes, sharp waves, or spike-and-wave complexes can be evident not only during a seizure (the ictal period) but also a short time before (the preictal period) as well as between seizures (the interictal period).
What is epileptiform brain activity?
“Epileptiform: describes transient background activity with characteristic spikes, sharp waves, spike slow-wave or sharp slow-wave complexes of focal or generalized distribution” and the background abnormality not matched with the state and age of the child.