 He developed a significant branch of pulmonary artery stenosis for which on 07/20/2004, he underwent a bilateral balloon pulmonary arterioplasty and stent implantation at the San Diego at Children's Hospital. 
He developed a significant branch of pulmonary artery stenosis for which on 07/20/2004 , he underwent a bilateral balloon pulmonary arterioplasty and stent implantation at the San Diego at Children 's Hospital .