Question

Difficulty: MediumCardiovascular System

Match each clinical presentation and its associated physical examination findings with the most likely underlying structural or valvular cardiac pathology.

  • Exertional syncope; auscultation reveals a late-peaking systolic murmur at the right second intercostal space and delayed carotid upstrokes.Severe Aortic Stenosis
  • Worsening exertional dyspnea; auscultation reveals a blowing holosystolic murmur at the apex radiating to the axilla.Chronic Mitral Regurgitation
  • Wide pulse pressure and bounding pulses; auscultation reveals a high-pitched, early diastolic decrescendo murmur at the left sternal border.Chronic Aortic Regurgitation
  • Exertional chest pain; auscultation reveals a harsh systolic crescendo-decrescendo murmur at the left lower sternal border that becomes louder when moving from squatting to standing.Hypertrophic Cardiomyopathy
  • Hemoptysis and progressive dyspnea; auscultation reveals a loud S1, an opening snap, and a low-pitched mid-diastolic rumble at the apex.Rheumatic Mitral Stenosis

Answer

The correct matches directly link the location, timing, and dynamic characteristics of the murmurs to their corresponding valvular or structural lesions.
Each clinical scenario contains specific, pathognomonic physical examination findings that point directly to one cardiac abnormality. The pairings accurately reflect these classic associations as routinely tested on the USMLE Step 2 CK exam.

Step-by-Step Solution

1
Analyze the location and timing of the murmur described in each clinical presentation.
Identified systolic murmurs (aortic stenosis, mitral regurgitation, hypertrophic cardiomyopathy) and diastolic murmurs (aortic regurgitation, mitral stenosis).
Timing and location are the primary ways to differentiate heart murmurs.
2
Correlate dynamic auscultation changes or associated peripheral findings.
Distinguished the murmur of hypertrophic cardiomyopathy (increases with standing) from aortic stenosis (presents with delayed carotid upstrokes).
Maneuvers and pulse characteristics provide definitive diagnostic clues for morphologically similar murmurs.
3
Match the complete clinical and auscultatory profiles with the correct etiologies.
All five presentations correctly paired with their structural abnormalities.
Synthesizing the physical exam findings leads directly to the underlying cardiac pathology.

Key Concept

Clinical presentation and auscultatory findings of valvular heart diseases and structural cardiomyopathies
Estimated Time:1m 30s
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