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Difficulty: MediumPhysical Examination Findings

Match the following classic cardiovascular physical examination findings with their most accurate underlying pathophysiologic mechanisms.

  • Pulsus parvus et tardusDelayed and diminished carotid upstroke secondary to fixed left ventricular outflow tract obstruction
  • Pulsus bisferiensBiphasic pulse with two palpable systolic peaks resulting from rapid initial ejection followed by dynamic mid-systolic obstruction
  • Pulsus alternansBeat-to-beat variation in peripheral pulse amplitude caused by severe left ventricular systolic dysfunction
  • Kussmaul signParadoxical rise in jugular venous pressure during inspiration due to impaired right ventricular diastolic filling

Answer

Pulsus parvus et tardus pairs with delayed/diminished upstroke due to fixed obstruction. Pulsus bisferiens pairs with biphasic pulse due to rapid initial ejection and dynamic obstruction. Pulsus alternans pairs with beat-to-beat amplitude variation due to severe LV dysfunction. Kussmaul sign pairs with paradoxical inspiratory JVP rise due to impaired RV filling.
The correct matching requires mapping classic eponymous or descriptive cardiovascular signs to their precise hemodynamic mechanisms. Recognizing that 'parvus et tardus' equates to fixed obstruction, 'bisferiens' equates to dynamic obstruction, 'alternans' implies poor contractility, and 'Kussmaul' implies restricted right ventricular filling is essential for rapid bedside diagnostic reasoning.

Step-by-Step Solution

1
Analyze 'Pulsus parvus et tardus'.
Identify it as a marker of severe aortic stenosis.
The translation 'small and late' directly correlates with a narrowed left ventricular outflow tract (fixed obstruction) that delays ejection.
2
Analyze 'Pulsus bisferiens'.
Identify it as a biphasic pulse characteristic of HOCM.
A double systolic peak requires a dynamic physiological process, such as rapid early ejection sharply interrupted by mid-systolic dynamic obstruction.
3
Analyze 'Pulsus alternans'.
Identify it as a sign of severe left ventricular failure.
An alternating strong and weak pulse in the setting of a regular rhythm reflects alternating stroke volumes due to severe myocardial dysfunction.
4
Analyze 'Kussmaul sign'.
Identify it as a marker of impaired right heart diastolic accommodation.
A paradoxical rise in jugular venous pressure with inspiration occurs when the right ventricle is too stiff or restricted to accept augmented venous return.

Key Concept

Cardiovascular Physical Examination Signs and Hemodynamics
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Topics

Physical Examination Findings

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