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Abstract #15900 Published in IGR 2-3
Prediction of the oculocardiac reflex from pre-operative linear and nonlinear heart rate dynamics in children
Kim HS; Kim SD; Kim CS; Yum MKAnaesthesia 2000; 55: 847-852
This study aimed to determine whether preoperatively measured linear and nonlinear analysis of heart rate variability might predict the occurrence of the oculocardiac reflex (OCR) or other arrhythmia during strabismus surgery in children (n = 185, mean (SD) age = 8.09 (3.31) years). The authors compared time and frequency domain, and nonlinear dynamic indices of preoperatively measured RR interval data between the OCR-positive group (maximum heart rate decrement = 20 beat.min-1 during the traction of extraocular muscle, n = 54), OCR-negative group (< 20 beat x min-1, n = 78) and the arrhythmia-positive group (all other arrhythmias; n = 53). pNN50, rMSSD, high-frequency power and nonlinear prediction error were significantly 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 preoperatively measured indices of linear and nonlinear heart rate variability, especially when used in combination, are valuable for predicting significant bradycardia during strabismus surgery in children.
Department of Anesthesiology, College of Medicine, Seoul National University, Seoul, South Korea
Classification:
12.17 Anesthesia (Part of: 12 Surgical treatment)
