ABSTRACT
ABSTRACT: To investigate the incidence of oculocardiac reflex and the differences in the decrease of heart rate according to muscle type, 126 extraocular muscles of 70 patients who underwent strabismus surgery by general anesthesia investigated prospectively. Before and after stretching the extraocular muscles, the heart rates were recorded. Wilcoxon signed ranks and paired t tests were used for statistical analysis. The heart rates before and after stretching 55 medial rectus (MR), 27 lateral rectus (LR), 15 superior rectus (SR), 18 inferior rectus (IR) and 10 inferior obliq (IO) were analysed statistically. The heart rate decreases in all muscle groups were found meaningful by statistical tests. The incidence of positive oculocardiac reflex during strabismus surgery in pediatric age group found significantly high. To determine the affects of anesthetic drug types and doses to oculocardiac reflex needs further studies.
