“… 1 , 2 , 3 , 4 Patients with obstructed TAPVC typically exhibit severe cyanosis and experience low cardiac output and respiratory distress soon after birth. 15 Conversely, patients with TAPVC without pulmonary venous obstruction, as observed in our case, may not exhibit symptoms at birth due to the presence of a systemic pulmonary shunt, which can occur through an atrial septal defect or patent ductus arteriosus (less commonly). 1 , 2 , 4 , 11 However, our case involved both of these conditions, making it difficult to detect cyanosis.…”