Difference between revisions of "GPD (Generalized periodic discharges)"

Latest revision as of 10:23, 3 July 2017

• Any pattern of generalized synchronous, repetitive discharges of similar morphology
• Relative symmetric
• Periodic, so with interdischarge interval recurring at nearly regular intervals.
  • A pattern can qualify as periodic as long as it continues for at least 6 cycles
• Frontal- or occipital-dominant.
• If a more ictal appearance it can be categorized as GPD+:^[1]
  • +F: superimposed fast activity.
  • +R: superimposed rhythmic or quasi-rhythmic activity.
  • +FR: superimposed fast activity and rhythmic or quasi-rhythmic activity.

• Not to be confused with intermittent rhythmic delta activity (IRDA)
  • TIRDA (temporal intermittent rhythmic delta activity)
  • OIRDA (occipital intermittent rhythmic delta activity)
  • FIRDA (frontal intermittent rhythmic delta activity)

• Not to be confused with lateralized of bilateral independent periodic discharges:
  • LPD (lateralized periodic discharges)
  • BI-LPD (Bilateral independent lateralized periodic discharges)

GPD’s in a 85 years old male after a out of hospital cardiac arrest (source), the discharges are symmetric, similar morphology with the same interdischarge intervals

Notes

1. ↑ ACNS STANDARDIZED ICU EEG NOMENCLATURE v. 2012