Neonatal Hypocalcemia By Kevin C Dysart, MD, Nemours / Alfred I duPont Hospital for Children Reviewed / Revised Mar 2021 | Modified Sep 2022 View Patient Education Etiology Symptoms and Signs Diagnosis Treatment Key Points Topic Resources QT Interval Correction (EKG) Hypocalcemia is a total serum calcium concentration < 8 mg / dL (< 2 mmol / L) in term infants or < 7 mg / dL (< 1.75 mmol / L) in preterm infants.