Right ventricular outflow tract

Tetralogy of Fallot is one of the most common congenital heart malformations. 3.6 infants with this condition are found every 10,000 births, accounting for 12% to 14% of congenital viscera, and the first in cyanotic heart malformations. Bit, accounting for 50% to 90%. In 1988, Fallot made a comprehensive elaboration of the four disease profiles and clinical characteristics of the disease, so he later called it tetralogy of Fallot. In 1944, Blalock first applied shunt surgery for anastomosis of the subclavian artery with the lung to reduce cyanosis. In 1954, Lillehei first achieved success in the heart of controlled cross circulation and direct tetralogy of Fallot. The two main anatomical abnormalities of the tetrad, the narrowing of the right ventricular outflow tract and the ventricular septal defect are quite variable. Right ventricular outflow tract: Right ventricular outflow stenosis can be located in the funnel, pulmonary valve, pulmonary annulus, pulmonary artery trunk or branch of pulmonary artery, and in some cases, there may be stenosis in two places.