Maternal Serum LDH as a Biochemical Marker of Disease Severity and Predictor of Fetomaternal Outcome in Preeclampsia

Abstract Background: Preeclampsia remains a leading cause of maternal and perinatal morbidity and mortality worldwide. Lactate dehydrogenase (LDH), a cytoplasmic enzyme released during cellular damage, reflects endothelial dysfunction and tissue hypoxia. Elevated serum LDH levels may serve as a valuable biomarker for assessing disease severity and predicting adverse outcomes in preeclampsia. Objective: To evaluate maternal serum LDH levels as a biochemical marker of disease severity and assess its predictive value for fetomaternal outcomes in women with preeclampsia. Methods: This prospective observational study conducted at Mahadevappa Rampure Medical College, Kalaburgi, included 30 pregnant women diagnosed with preeclampsia admitted to the Department of Obstetrics and Gynecology. Serum LDH levels were measured within 24 hours of admission using standard enzymatic kinetic method. Patients were classified into mild (36.7%) and severe (63.3%) preeclampsia based on clinical and laboratory criteria. Maternal outcomes (eclampsia, HELLP syndrome, abruption placentae, ICU admission) and fetal outcomes (birth weight, Apgar scores, IUGR, NICU admission, perinatal mortality) were documented. ROC curve analysis determined optimal cutoff values for predicting adverse outcomes. Results: Mean serum LDH levels were significantly higher in severe preeclampsia (687.4±142.6 IU/L) compared to mild preeclampsia (412.3±68.5 IU/L; p