Medical MCQ-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?

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?

PDA with reversal of shunt

VSD with Eissenmenger syndrome

Tetralogy of Fallot

ASD with reversal of shunt

Question Category:

Pediatrics

Correct Answer:

PDA with reversal of shunt

Description:

--> 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.

Previous MCQ

Next MCQ

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon