Performance of Carbon Dioxide (CO2)-Derived Parameters in Predicting Low Cardiac Output Syndrome

In congenital cardiac intensive care, low cardiac output syndrome (LCOS) after surgery is defined by a decrease in cardiac output due to cardiac dysfunction. This syndrome is responsible for postoperative mortality and morbidity, as well as prolonged hospitalization. carbon dioxide (CO2)-derived parameters are increasingly used to identify low cardiac output status by the venous-to-arterial carbon dioxide difference (PCO2 gap), or anaerobic metabolism by the venous-to-arterial carbon dioxide difference to arterial-to-venous oxygen content difference (Pv-aCO2/Ca-vO2) ratio, particularly in septic shock in adults, with or without hypoxemia. The thresholds proposed as pathological values were a PCO2 gap ≥ 6 mmHg and a Pv-aCO2/Ca-vO2 ratio ≥ 1.4 mmHg/ml. However, these markers have not been studied in depth in patients who have undergone cardiac surgery. In adults, studies have focused on t