Older children with an unrepaired cardiac septal defect experience cyanosis because of which factor?
A)Right-to-left shunts
B)Left-to-right shunts
C)Obstructive lesions
D)Mixed lesions

Question

Quizplus · Accepted Answer

Older children who have an unrepaired septal defect with a left-to-right shunt may become cyanotic because of pulmonary vascular changes secondary to increased pulmonary blood flow. Left-to-right shunts are usually acyanotic. Obstructive and mixed lesions vary in their presentation but obstructive lesions do not include shunting.

Older Children with an Unrepaired Cardiac Septal Defect Experience Cyanosis