| Abstract: | Pulmonary outflow tract obstruction may occur at subvalve, valve, or pulmonary artery level. Selective ventriculography will usually define the intracardiac obstruction (whether valve, subvalve, or both) and may define pulmonary arterial abnormalities. Increasing experience in the surgical management of patients with tetralogy of Fallot and other conotruncal abnormalities characterized by significant pulmonary outflow tract obstruction suggests that preoperative recognition of pulmonary arterial stenosis is essential to the successful operative management of these patients (1-4). |
