Tetralogy of Fallot is a congenital heart defect in dogs that includes four separate defects: pulmonic stenosis, a ventricular septal defect, right ventricular hypertrophy, and an overriding aorta.

• + %23[[法乐四联症]]是一种先天性心脏病，它包括四个部位的异常：[[肺动脉口狭窄]]、[[室间隔缺损]]、[[右心室流出道狭窄]]和[[主动脉栓塞]]。[[凯斯犬]]和[[斗牛犬]]易感。