To investigate the current source location from the electroencephalograms (EEGs) of 12 patients who showed typical triphasic waves attributable to various causes, using the combination of a dipole source model and a distributed source model. The triphasic waves were explained by a single main dipole in 10 of the 12 patients, and 2 patients had two dipoles responsible for the triphasic waves. All the main dipoles had a radial orientation with respect to the frontal pole. The current density of the triphasic waves was distributed mainly in the bilateral medial frontal regions along the cingulate cortices. These findings suggest that current sources located in the medial frontal area are crucial for generating triphasic waves. The source localization may be useful for elucidating the pathophysiologic mechanism of generalized non-epileptic EEG activities, such as triphasic waves.
To develop measures to prevent neonatal rotavirus infection, we carried out rotavirus surveillance testing on all the newborns who were admitted to a newborn nursery in Korea during 1 year. We investigated the characteristics of neonatal rotavirus infection and found that it occurred throughout the year with the G4P[6] strain exclusively. Most newborns were infected nosocomially and showed no symptoms. We concluded that rotavirus might be transmitted from asymptomatic infected newborns who were born outside the hospital. We recommend isolation and rotavirus surveillance testing for all transfer patients.
SummaryThis study was aimed to determine whether pre-operatively measured linear and nonlinear analysis of heart rate variability might predict the occurrence of the oculocardiac re¯ex (OCR) or other arrhythmia during strabismus surgery in children (n 185, mean (SD) age 8.09 (3.31) years). We compared time-and frequency-domain, and nonlinear dynamic indices of pre-operatively measured RR interval data between the OCR-positive group (maximum heart rate decrement 20 beat.min À1 during the traction of extraocular muscle, n 54), OCR-negative group (< 20 beat.min À1 , n 78) and arrhythmia-positive group (all other arrhythmias; n 53). pNN50, rMSSD, high-frequency power and nonlinear prediction error were signi®cantly lower in the OCR-positive and arrhythmia-positive groups than in the OCR-negative group. Discriminant analysis using these indices could correctly identify 39/54 (72.2%) OCR-positive patients. Some pre-operatively measured indices of linear and nonlinear heart rate variability, especially when used in combination, are valuable for predicting signi®cant bradycardia during strabismus surgery in children.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.