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1 results

  • Chapter 6 - Rhythmic and Periodic Patterns (RPPs) and the Ictal‐Interictal Continuum (IIC)

  • from Part I - Introduction
  • Neville M. Jadeja, University of Massachusetts Medical School, Kyle C. Rossi, University of Massachusetts Medical School
  • Book:
    Critical Care EEG Basics
    Published online:
    22 February 2024
    Print publication:
    29 February 2024, pp 83-98

  • Summary

    This chapter focuses on rhythmic and periodic patterns (RPPs). These are common EEG patterns found in critically ill patients. The variety of different types of patterns and their standardized naming conventions are described here. These patterns span from serving as markers of encephalopathy, to markers of seizure risk (interictal), to status epilepticus itself (ictal), and everything in between. This broad potential of diagnostic significance is known as the ictal–interictal injury continuum (IIIC). This chapter describes strategies for differentiating between more benign and more malignant RPPs. Basic management strategies for these IIIC patterns are also described in this chapter.