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Difficulty: MediumCardiovascular System

Match each classic cardiac auscultation finding with the valvular pathology it most accurately describes.

  • Harsh, crescendo-decrescendo systolic murmur at the right upper sternal border with radiation to the carotidsAortic stenosis
  • Low-pitched, mid-diastolic rumbling murmur at the cardiac apex preceded by an opening snapMitral stenosis
  • High-pitched, holosystolic murmur at the apex with radiation to the left axillaMitral regurgitation
  • Blowing, early diastolic decrescendo murmur at the left sternal border exacerbated by sitting up and leaning forwardAortic regurgitation

Answer

The harsh systolic murmur at the right upper sternal border matches aortic stenosis. The mid-diastolic rumbling murmur with an opening snap matches mitral stenosis. The holosystolic murmur at the apex matches mitral regurgitation. The early diastolic decrescendo murmur matches aortic regurgitation.
Each valvular lesion produces distinct auscultatory findings due to turbulent blood flow across abnormal structures during specific phases of the cardiac cycle. Aortic stenosis creates a systolic ejection murmur at the base. Mitral regurgitation causes an apical holosystolic murmur. Mitral stenosis leads to an apical diastolic rumble, and aortic regurgitation produces an early diastolic decrescendo murmur at the left sternal border.

Step-by-Step Solution

1
Analyze the timing of each murmur to differentiate between systolic and diastolic pathologies.
The crescendo-decrescendo and holosystolic murmurs occur during systole. The rumbling murmur with an opening snap and the blowing decrescendo murmur occur during diastole.
Murmur timing corresponds to ventricular contraction (systole) or relaxation (diastole), rapidly narrowing down the affected valve and the type of lesion (stenosis vs. regurgitation).
2
Evaluate the locations and radiation of the systolic murmurs.
The right upper sternal border murmur radiating to the carotids is identified as aortic stenosis. The apical holosystolic murmur radiating to the axilla is identified as mitral regurgitation.
Anatomic location and radiation patterns map directly to the anatomical position and blood flow direction of the specific valves during systole.
3
Evaluate the locations, extra sounds, and maneuvers associated with the diastolic murmurs.
The apical murmur with an opening snap is identified as mitral stenosis. The left sternal border murmur worsened by leaning forward is identified as aortic regurgitation.
Special characteristics like the opening snap and positional maneuvers help definitively confirm diastolic valvular defects.

Key Concept

Differentiation of valvular heart diseases based on auscultation findings
Estimated Time:1m 0s
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Topics

Cardiovascular System

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