 He had undergone staged repair beginning on 04/21/1997 with a right modified Blalock-Taussig shunt followed on 09/02/1999 with a bilateral bidirectional Glenn shunt, and left pulmonary artery to main pulmonary artery pericardial patch augmentation. 
He had undergone staged repair beginning on 04/21/1997 with a right modified Blalock - Taussig shunt followed on 09/02/1999 with a bilateral bidirectional Glenn shunt , and left pulmonary artery to main pulmonary artery pericardial patch augmentation .