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Difficulty: EasyCardiovascular System

Match the following classic arterial pulse abnormalities with their most likely underlying cardiovascular pathology.

  • Pulsus paradoxusCardiac tamponade
  • Pulsus parvus et tardusSevere aortic stenosis
  • Pulsus alternansSevere left ventricular systolic dysfunction
  • Water-hammer (Corrigan) pulseSevere aortic regurgitation

Answer

Pulsus paradoxus matches with cardiac tamponade, pulsus parvus et tardus matches with severe aortic stenosis, pulsus alternans matches with severe left ventricular systolic dysfunction, and water-hammer pulse matches with severe aortic regurgitation.
Each specific arterial pulse waveform abnormality corresponds to a unique hemodynamic derangement. Cardiac tamponade causes inspiratory ventricular interdependence (pulsus paradoxus). Aortic stenosis causes restricted outflow (parvus et tardus). Heart failure causes alternating stroke volumes (pulsus alternans). Aortic regurgitation causes widened pulse pressure and rapid runoff (water-hammer pulse).

Step-by-Step Solution

1
Analyze the hemodynamic mechanism of an exaggerated respiratory drop in blood pressure (pulsus paradoxus).
This indicates restricted right ventricular expansion leading to leftward bowing of the interventricular septum during inspiration.
This ventricular interdependence is the classic pathophysiologic hallmark of cardiac tamponade.
2
Evaluate the cause of a low-amplitude, delayed arterial upstroke (pulsus parvus et tardus).
This reflects a prolonged, restricted ejection of blood from the left ventricle.
This is characteristic of the fixed obstruction seen in severe aortic stenosis.
3
Determine the significance of beat-to-beat variation in pulse amplitude with a regular rhythm (pulsus alternans).
This reflects an alternating stroke volume from a failing myocardium.
It is a highly specific sign of severe left ventricular systolic dysfunction.
4
Identify the condition that produces a rapid upstroke and rapid collapse of the peripheral pulse (water-hammer pulse).
This requires a massive stroke volume combined with a low diastolic pressure (widened pulse pressure).
This hemodynamic profile is produced by the severe diastolic backward flow into the left ventricle in severe aortic regurgitation.

Key Concept

Classic arterial pulse abnormalities and their associated structural heart diseases
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Topics

Cardiovascular System

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