Heart Failure USMLE Step 1 Practice Question
A 2-month-old girl presents with poor feeding and diaphoresis during feeds. Maternal history reveals rubella infection during pregnancy. Vital signs show HR 160/min, RR 48/min, BP 85/55 mmHg, and SpO2 92% on room air. Cardiac examination reveals a continuous "machinery" murmur below the left clavicle. Chest X-ray demonstrates cardiomegaly with pulmonary congestion. Notably, no cyanosis is present. She is not currently on cardiac medications. Which diagnosis best explains these findings?
Answer choices
- APatent ductus arteriosusCorrect answer
- BTetralogy of Fallot
- CAtrial septal defect
- DCoarctation of the aorta
- EVentricular septal defect
- FTransposition of the great arteries
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