Hypophosphataemia causing profound cardiac failure after cardiac surgery.

We report the case of a patient who developed severe cardiac failure after cardiac surgery and required high-dose inotrope infusion. The patient was found to have significant hypophosphataemia and high insulin requirements immediately after surgery. On giving intravenous phosphate, there was a rapid decrease in inotrope requirement and improved glycaemic control. This occurrence raises questions about the cause of hypophosphataemia after cardiac surgery, the possible need for pre-operative plasma phosphate measurement and whether phosphate replacement should be part of the standard management of postoperative hypophosphataemia.