A 4 year old child had cyanosis only involving the lower limbs, but not involving the upper limbs. Which of the following could be a possible underlying cause for differential cyanosis?
--> Differential cyanosis is seen in PDA with reversal of shunt --> Differential cyanosis: No cyanosis in upper limbs --> as oxygenated blood goes there. Cyanosis in lower limbs --> d/t mixing of oxygenated blood with deoxygenated blood. PATENT DUCTUS AERIOSUS : --> Failure of closure of Ductus aeriosus after bih , resulting in persistent connection b/w aoa & pulmonary aery. --> Hypoxia & prematurity predispose to PDA --> AUSCULTATION --> Continuous machinery murmur is seen --> DOC for medical closure of PDA in preterm neonate --> PG Inhibitor --> Normally PDA is acyanotic hea disease but with reversal of shunt, differential cyanosis is seen.
PDA with reversal of shunt
VSD with Eissenmenger syndrome
Tetralogy of Fallot
ASD with reversal of shunt
Acyanotic congenital hea diseases