Gross Anatomy USMLE Step 1 Practice Question
A 47-year-old female with rheumatic fever history presents with dyspnea on exertion. Vital signs show BP 128/76 mmHg, HR 92/min, RR 18/min, temp 37.2°C, SpO2 98% on room air. Cardiac examination reveals a low-pitched, rumbling diastolic murmur preceded by an opening snap. Chest X-ray shows mild left atrial enlargement. No peripheral edema noted. She takes no cardiac medications. At which anatomical location is this murmur best appreciated?
Answer choices
- ARight second intercostal space
- BLeft lower sternal body border
- CLeft second intercostal space
- DRight fifth intercostal space
- ELeft fifth intercostal spaceCorrect answer
- FLeft third intercostal space at the midaxillary line
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