The objective is to investigate a goal-oriented postoperative circulation management strategy centered on "oxygen metabolism balance". This strategy is independent of the absolute metrics of oxygen supply and consumption, and aims to enhance oxygen consumption and uptake within the critical "golden 8 hours" following pediatric cardiopulmonary bypass, thereby preventing severe hypotension, cardiopulmonary arrest, and other adverse events.
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Number of participants with low cardiac output syndrome
Timeframe: 72 hours after surgery