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Prediction of the oculocardiac reflex from pre‐operative linear and nonlinear heart rate dynamics in children
Author(s) -
Kim H. S.,
Kim S. D.,
Kim C. S.,
Yum M. K.
Publication year - 2000
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1046/j.1365-2044.2000.01158.x
Subject(s) - medicine , oculocardiac reflex , heart rate , heart rate variability , cardiology , bradycardia , linear discriminant analysis , strabismus , reflex , anesthesia , audiology , surgery , statistics , mathematics , blood pressure
This study was aimed to determine whether pre‐operatively 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). 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 −1 during the traction of extraocular muscle, n = 54), OCR‐negative group (< 20 beat.min −1 , n = 78) and 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 pre‐operatively 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.