Complex neonatal congenital heart surgery in Nevada.

Objective: We reviewed our center's surgical mortality rates for those who underwent a Society of Thoracic Surgeons-European Association for Cardio-Thoracic Surgery (STAT) category 4 or 5 neonatal cardiovascular surgery.

Methods: We identified all patients who underwent a STAT category 4 or 5 neonatal index cardiovascular surgical procedure between July 2015 and July 2021.

Results: We identified 239 patients. We divided them into two groups: (1) 42 (17.6%) ≤2.5 kg, and (2) 197 (82.4%) were >2.5 kg at the time of neonatal surgery. Of those ≤2.5 kg, 18/42 (42.9%) had syndromes or associated noncardiac malformations versus 34/197 (17.3%) of those >2.5 kg, p = .0093. Thirty-day discharge mortality for those ≤2.5 kg was 3/42 (7.1%) versus l0/197 (5.1%) for those >2.5 kg, p = .83.

Conclusions: Weight at the time of surgery, presence of syndromes, and associated noncardiac malformations did not affect mortality in those undergoing complex neonatal STAT 4 or 5 category cardiovascular surgery.