Cyanotic congenital heart lesions include all of the following except?

Cyanotic congenital heart lesions are characterized by the presence of desaturated blood flow, leading to cyanosis due to a right-to-left shunt or other mechanisms that allow deoxygenated blood to enter systemic circulation. Each of the other conditions listed is associated with varying degrees of cyanosis.

In the case of ostium primum defect, which is a type of atrial septal defect associated with atrioventricular septal defects, the shunting is typically left-to-right due to the higher pressure in the left atrium compared to the right atrium. This condition usually does not lead to cyanosis because it primarily causes increased pulmonary blood flow without allowing deoxygenated blood to bypass the lungs like the other listed conditions.

Tricuspid atresia, Tetralogy of Fallot, and total anomalous pulmonary venous return all disrupt normal blood flow patterns leading to cyanosis in patients. Tricuspid atresia involves a right-to-left shunt, causing deoxygenated blood to enter the systemic circulation, and Tetralogy of Fallot is characterized by a combination of four abnormalities that also causes a right-to-left shunt. Total anomalous pulmonary venous return results in the pulmonary veins draining into the right atrium instead