Perfusion Index and Cerebral NIRS Trends in Low Cardiac Output Syndrome

In this prospective, observational study, we aim to investigate whether routinely monitored Perfusion Index (PI) and cerebral oxygen saturation (NIRS) values in pediatric patients aged 0-6 undergoing congenital heart surgery are associated with Low Cardiac Output Syndrome. Pediatric patients aged 0-6 years undergoing congenital heart surgery will be followed primarily for Cerebral Near-Infrared Reflectance Spectroscopy, and Perfusion Index (PI) values both in the operating room during the operation, and in the Pediatric Cardiac Intensive Care Unit during the first 24 hours postoperatively. The patients with Low Cardiac Output Syndrome will be recorded, and the changes in Cerebral Near-Infrared Reflectance Spectroscopy, and Perfusion Index (PI) values will be evaluated to determine whether they can predict low cardiac output.