“…Tricuspid atresia accoun ts for 2 % to 3 % of all cardiac malformations (9 , 27,34, 35) , for 5 % of cyanotic cardiac diseases ( 9,12,37) or 0.05 % of life birth s (41) . The prognosis is very poor, depending largely on an adequate pulmonary blood flow (IS , 31,52,53) .…”