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Difficulty: EasyCardiovascular System

Match each valvular heart disease with its most characteristic auscultatory physical exam finding.

  • Aortic stenosisCrescendo-decrescendo systolic murmur at the right upper sternal border radiating to the carotids
  • Mitral regurgitationHolosystolic murmur at the apex radiating to the axilla
  • Aortic regurgitationEarly diastolic decrescendo murmur best heard along the left sternal border
  • Mitral stenosisMid-to-late diastolic rumbling murmur preceded by an opening snap

Answer

Aortic stenosis pairs with the crescendo-decrescendo systolic murmur. Mitral regurgitation pairs with the holosystolic murmur. Aortic regurgitation pairs with the early diastolic decrescendo murmur. Mitral stenosis pairs with the diastolic rumbling murmur preceded by an opening snap.
Each valvular lesion produces characteristic auscultatory findings determined by the phase of the cardiac cycle (systole versus diastole), the direction of the abnormal blood flow, and the anatomic structures adjacent to the affected valve. Identifying these combinations correctly is fundamental to clinical diagnosis.

Step-by-Step Solution

1
Determine the cardiac cycle timing (systole vs. diastole) for each valvular defect.
Aortic stenosis and mitral regurgitation create systolic murmurs. Aortic regurgitation and mitral stenosis create diastolic murmurs.
Timing is the primary branching point in identifying heart murmurs on physical exam.
2
Differentiate between the two systolic murmurs based on acoustic shape and radiation pattern.
The forward flow of aortic stenosis creates a crescendo-decrescendo pattern radiating to the carotids, while the backward flow of mitral regurgitation creates a uniform holosystolic pattern radiating to the axilla.
Anatomic location of the valves and direction of abnormal blood flow dictate where the murmur radiates.
3
Differentiate between the two diastolic murmurs based on specific clinical hallmarks.
Aortic regurgitation produces a high-pitched decrescendo blowing murmur, whereas mitral stenosis is uniquely associated with an opening snap followed by a low-pitched rumble.
Structural differences in the valves (e.g., thickened mitral leaflets snapping open) produce unique acoustic signatures.

Key Concept

Characteristic auscultatory physical exam findings of major valvular heart diseases
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Topics

Cardiovascular System

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