Acyanotic tetralogy of Fallot

A cyanotic heart defect is any congenital heart defect (CHD) that occurs due to deoxygenated blood bypassing the lungs and entering the systemic circulation, or a mixture of oxygenated and unoxygenated blood entering the systemic circulation. It is caused by structural defects of the heart such as right-to-left or bidirectional shunting, malposition of the great arteries, or any condition which increases pulmonary vascular resistance. [Source: Wikipedia ]

Pink tetralogy of Fallot
Is A
Tetralogy of Fallot
May Cause
Left-to-right shunt in congenital heart disease