Congenital Heart Disease USMLE Step 1 Practice Question
A 2-year-old boy with a history of cyanotic heart disease presents to the ED with acute severe cyanosis and syncope during crying. His mother reports 'tet spells' that respond to knee-chest positioning. Cardiac examination reveals a single S2 and a harsh systolic ejection murmur at the left upper sternal border. Which of the following is the most likely diagnosis?
Answer choices
- ATransposition of the great arteries
- BVentricular septal defect
- CPatent ductus arteriosus
- DTetralogy of FallotCorrect answer
- EPulmonary stenosis
- FTricuspid atresia
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