Difference between revisions of "LPD (lateralized periodic discharges)"
From EEGpedia
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*'''P'''eriodic: Relative constant interval between the discharges, which varies between 0.5 and 3 seconds (most often around 1 second) | *'''P'''eriodic: Relative constant interval between the discharges, which varies between 0.5 and 3 seconds (most often around 1 second) | ||
*'''D'''ischarge: Could be [[Delta waves]] or sharp waves with a “epileptiform” morphology | *'''D'''ischarge: Could be [[Delta waves]] or sharp waves with a “epileptiform” morphology | ||
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* If a more ictal appearance it can be categorized as LPD+:<ref>ACNS STANDARDIZED ICU EEG NOMENCLATURE v. 2012</ref> | * If a more ictal appearance it can be categorized as LPD+:<ref>ACNS STANDARDIZED ICU EEG NOMENCLATURE v. 2012</ref> | ||
**'''+F''': superimposed fast activity. | **'''+F''': superimposed fast activity. | ||
**'''+R''': superimposed rhythmic or quasi-rhythmic activity. | **'''+R''': superimposed rhythmic or quasi-rhythmic activity. | ||
**'''+FR''': superimposed fast activity and rhythmic or quasi-rhythmic activity. | **'''+FR''': superimposed fast activity and rhythmic or quasi-rhythmic activity. | ||
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*LPD’s are seen in acute cerebral laesion | *LPD’s are seen in acute cerebral laesion | ||
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***Other structural lesions | ***Other structural lesions | ||
* Tend to disappear in weeks | * Tend to disappear in weeks | ||
| − | * Higher risk of seizures in patients with LPD’s | + | * Higher risk of seizures (50-80%) in patients with LPD’s <ref>Garcia-Morales et al, Periodic lateralized epileptiform discharges: etiology, clinical aspects, seizures, and evolution in 130 patients.J Clin Neurophysiol. 2002 Apr;19(2):172-7. </ref> |
Latest revision as of 09:37, 19 May 2017
Synonyme: PLED (Periodic lateralized epileptiform discharges)
- Lateralized: Unilateral
- Periodic: Relative constant interval between the discharges, which varies between 0.5 and 3 seconds (most often around 1 second)
- Discharge: Could be Delta waves or sharp waves with a “epileptiform” morphology
- If a more ictal appearance it can be categorized as LPD+:[1]
- +F: superimposed fast activity.
- +R: superimposed rhythmic or quasi-rhythmic activity.
- +FR: superimposed fast activity and rhythmic or quasi-rhythmic activity.
- LPD’s are seen in acute cerebral laesion
- Non specific:
- Acute cerebrovascular events
- Encephalitis
- Subdural hematoma
- Other structural lesions
- Non specific:
- Tend to disappear in weeks
- Higher risk of seizures (50-80%) in patients with LPD’s [2]
LPD's left parieto occipital in a male of 78 years old with a hemmorrhage left occipital (average)
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Notes
