A patient with new-onset syncope has a blood pressure of 110/95 mm Hg and a harsh systolic ejection murmur at the base, radiating to both carotids. Auscultation of the second heart sound at the base might reveal which of the following findings?

**Core Concept**
The patient's presentation suggests **aortic stenosis**, characterized by a harsh systolic ejection murmur and symptoms of syncope. The murmur's radiation to both carotids is a classic finding. **Aortic stenosis** is often associated with a narrow pulse pressure, which is evident in this patient's blood pressure reading.

**Why the Correct Answer is Right**
In **aortic stenosis**, the second heart sound (A2) at the base may be soft or even inaudible due to the stenotic valve's effect on aortic valve closure. This finding is consistent with severe **aortic stenosis**. The harsh systolic ejection murmur and radiation to carotids support this diagnosis.

**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because a normal A2 would not be expected in the context of significant **aortic stenosis**.
**Option B:** This choice might seem plausible but is not the most accurate description of what is typically found in **aortic stenosis**.
**Option C:** This is not typically associated with the auscultation findings in **aortic stenosis**.
**Option D:** While **aortic stenosis** can lead to changes in the second heart sound, the specific description provided does not match the expected finding.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that in **aortic stenosis**, the intensity of the murmur does not always correlate with the severity of the stenosis. However, the presence of symptoms such as syncope, heart failure, or chest pain is more indicative of severe disease.

**Correct Answer:** D. Single or soft second heart sound

✓ Correct Answer: B. it is diminished