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Positive rolandic sharp waves in neonatal EEG; types and significance
Electroencephalography and Clinical Neurophysiology
|March 1, 1982
Summary
Two types of electropositive rolandic sharp waves (PRS) in infant EEGs have different prognoses. Type B PRS indicates a more favorable outcome than Type A or no PRS, especially in premature infants.
Area of Science:
- Neonatal Neurology
- Electroencephalography (EEG)
- Developmental Neuroscience
Background:
- Electropositive rolandic sharp waves (PRS) are EEG patterns observed in infants.
- Different types of PRS may have varying implications for neurodevelopmental outcomes.
- Understanding these patterns is crucial for predicting long-term neurological status.
Purpose of the Study:
- To differentiate between two types of electropositive rolandic sharp waves (PRS) in premature infants.
- To investigate the distinct prognostic implications of Type A and Type B PRS on neurodevelopmental outcomes at two years of age.
- To compare the predictive value of PRS types with the absence of PRS and intraventricular hemorrhage (IVH).
Main Methods:
- Analysis of electroencephalograms (EEGs) from premature infants, categorizing PRS into Type A (single, distinct) and Type B (bursts, blended).
- Correlation of PRS types with neurological examination findings and sequelae at two years of age.
- Assessment of PRS presence and type in relation to conceptional age at recording and occurrence of intraventricular hemorrhage (IVH).
Main Results:
- Type B PRS, whether alone or with Type A, was associated with significantly higher rates of normal or minor neurological sequelae at two years compared to Type A alone or no PRS.
- In infants <35 weeks' conceptional age, Type A only had 21% favorable outcomes, while Type A + B had 86%. No PRS had 42% favorable outcomes.
- In infants ≥35 weeks' conceptional age, Type A only had 57% favorable outcomes, Type B only had 75%, Type A + B had 92%, and no PRS had 53%.
- While most patients with IVH had Type A PRS, only 50% of patients with Type A PRS (recorded <35 weeks) developed IVH.
Conclusions:
- Type B electropositive rolandic sharp waves (PRS) indicate a relatively favorable prognosis in infants, outperforming Type A PRS and the absence of PRS.
- The presence of Type B PRS is a more significant positive prognostic indicator than Type A PRS.
- Infants with Type B PRS demonstrate better neurodevelopmental outcomes, highlighting the importance of EEG pattern differentiation for predicting infant neurological health.