在紫组型先天性心脏病中，法乐氏四联症（简称“四联症”）占绝大多数，此症的伴发畸形较多，现将作者所遇到的四种畸形及其手术方法介绍如下。肺动脉瓣缺如息儿，男，10岁。幼年时经常感冒、发烧，呼吸急促。3岁以后症状减轻，无紫组和蹲踞。胸骨左缘第三、四助间4／6级收缩期 In the purple group of congenital heart disease, tetralogy of Fallot (referred to as “Tetralogy of Fallot”) accounted for the vast majority of this disease associated with more deformities, the author encountered four deformities and its Surgical methods are described below. Pulmonary valve absence of infants, male, 10 years old. Infancy often cold, fever, shortness of breath. After 3 years of age reduce symptoms, no purple group and squatting. Left sternal third, fourth aid between 4/6 systolic