The paper provides the results of a modified subclavian pulmonary anastomosis by employing Gore-Tex vascular prostheses in 91 babies with Fallot's tetrad whose age was 10 days to 32 months and weight was 3.6 to 15 kg. In 89 patients, the operation was performed by using a prosthesis, 4-6 mm in diameter, without crossing the subclavian artery, whereas in 2 patients, this was done by lengthening the crossed short subclavian artery. In the early postoperative period, 2 (2.2%) patients died, anastomosis thrombosis requiring a reoperation, occurred in 3 (3.3%) patients; other non-fatal complications were observed in 8 (8.8%) patients. A clear-cut effect of the operation was seen in all patients. SaO2 rose from 54 +/- 18 to 80.0 +/- 8%. In the long-term (6-60 months) postoperative periods, a total of 77 patients were examined: anastomosis function proved to be impaired in 4 (5.2%), all the vascular prostheses, 6 mm in diameter, were patent up to 60 months of surgery. The thrombosis probability for anastomosis, 5 mm in diameter, was 5% during 12 months of operation and 16% during 24-60 months. Three patients needed therapeutical management of heart failure. Other serious complications, including deformity of the pulmonary artery or upper extremity, were not found in the examinees. In the palliative treatment of Fallot's tetrad, subclavian pulmonary anastomosis via the Gore-Tex vascular prosthesis can be the method of choice in the first-year-old infants and has some substantial advantages over the classical Blelock-Taussig anastomosis.