[Acquired pulmonary atresia complicating tetralogy of Fallot]

Pf 51 cases of Fallot's tetralogy who underwent preoperative angiography before a palliative anastomosis and then a second angiography before complete correction, 10 had developed pulmonary atresia (infundibular in 8 cases, valvular in 2 cases). The type of anastomosis (Blalock-Taussig of Waterston), and the interval between the two operations do not seem to be determinant factors. The initial severity of the stenosis seems to favour the development of atresia but this is not invariable. The authors discuss the aggravating role of the anastomosis and the consequences of this type of complication.