You are caring for a 3 month old with FTT who is S/P surgica…

You are caring for a 3 month old with FTT who is S/P surgical VSD closure. He had a long cardiopulmonary bypass time and you have identified on post op day #1 that he meets criteria for Acute Kidney Injury. His Serum creatinine and NGAL are elevated on today’s labs and his renal perfusion pressure overnight has been below his set goal based on age. Based on the information that you have what is the most likely etiology of his AKI?