Preoperative prognostic nutritional index and in-hospital mortality in neonates undergoing cardiac surgery for congenital heart disease: a single-center retrospective study

BackgroundNeonates undergoing cardiac surgery for congenital heart disease (CHD) represent one of the highest-risk subpopulations in pediatric cardiac surgery. Preoperative nutritional and immune reserve may substantially influence perioperative resilience, yet practical neonatal-specific nutritional risk markers remain insufficiently defined.ObjectiveTo evaluate the association between preoper...