D C43262 Exophthalmos Exophthalmos A protrusion of the eyeball from the socket. C99208 Eye Finding C99147 Neonatal Research Network Terminology D C92781 Beat to Beat Variability Beat to Beat Variability Fetal Heart Rate Variability A fetal heart monitor finding where there is a change in the beats per minute from one fetal heart beat to the next. C92790 Fetal Heart Rate Variability C99147 Neonatal Research Network Terminology