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Difficulty: HardPhysical Examination Findings

An 81-year-old man is brought to the emergency department after experiencing a syncopal episode while shoveling snow. He regained consciousness within one minute without intervention. His family notes he has been increasingly fatigued over the past half-year. Cardiac auscultation identifies a harsh systolic murmur at the base of the heart. Which of the following physical examination findings would most strongly suggest that the patient has severe, rather than mild, aortic stenosis? Select all that apply.

  1. Late-peaking intensity of the systolic murmurAnswer
  2. Diminished and delayed carotid arterial upstrokesAnswer
  3. C
    Markedly widened systemic pulse pressure
  4. D
    High-intensity A2 component of the second heart sound
  5. E
    Early-peaking intensity of the systolic murmur

Answer

The findings that indicate severe aortic stenosis are a late-peaking intensity of the systolic murmur and diminished, delayed carotid arterial upstrokes (pulsus parvus et tardus).
In severe aortic stenosis, the highly restricted valve area creates a significant obstacle to left ventricular outflow. This hemodynamic obstruction results in a prolonged ventricular ejection time, causing the crescendo-decrescendo systolic murmur to peak later in systole. Furthermore, the restricted forward flow into the aorta dampens the arterial pulse, causing the carotid upstrokes to have a low amplitude (parvus) and a delayed peak (tardus).

Step-by-Step Solution

1
Analyze the patient's presentation
Syncope upon exertion and a harsh systolic murmur at the base of the heart point to a primary diagnosis of aortic stenosis.
Identifying the baseline valvular lesion is necessary before differentiating its severity based on clinical signs.
2
Correlate physical examination findings with the hemodynamic severity of aortic stenosis
Severe obstruction leads to a prolonged left ventricular ejection time and reduced forward stroke volume.
Understanding the pathophysiology of severe stenosis allows for the direct deduction of associated clinical signs on physical examination.
3
Evaluate the given options based on the pathophysiology of severe aortic stenosis
A late-peaking murmur and pulsus parvus et tardus match severe stenosis hemodynamics, whereas a narrowed pulse pressure, absent/soft A2, and early-peaking murmur would be expected instead of the other distractors.
To accurately select all the findings that differentiate severe from mild-to-moderate valvular disease.

Key Concept

Differentiating the physical examination findings of severe versus mild aortic stenosis based on their underlying hemodynamic consequences.
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Topics

Physical Examination Findings

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