Postoperative 6thhour, heparin initiated (infusion rate of 15 U/kg/hour) if there was no bleeding (ceased at postoperative 1st day). Postoperative 1st day enoxaparin (1mg/kg/day)initiated (single dose/day, ceased at discharge). Postoperative 1st day intravenous (iv) furosemide (1mg/kg/day) initiated (switched to peroral (po) furosemide (1 mg/kg/day, two divided doses) after the drains were removed). Lisinopril 0,1 mg / kg / day (po, single dose) Spironolactone 1 mg/kg/day (po, two divided doses) Aspirin 5 mg/kg/day (po, single dose) Sildenafil 3 mg/kg/day (po, three doses) 0.5 L/min nasal oxygen supply until drains were removed Fluid restriction (80% of daily fluid requirement) Low fat diet (30% of daily calories from fat) Chest tubes were removed when drainage decreased to 2 ml/kg/day In case of a drainage exceeding a week, fat was withdrawn from the diet except medium chain triglycerides If drainage continued, oral feeding was ceased and total parenteral nutrition was initiated Catheter angiography for detecting and correcting the residual pathologies in case of an ongoing drainage more than 14 days or for creating a transcatheter fenestration in case of a high Fontan pressure without a residual pathology.