During the cardiovascular physical examination, distinct abnormalities in the arterial pulse contour and amplitude can provide critical clues to the underlying structural or hemodynamic pathology. Match each abnormal arterial pulse description to the cardiac condition it most classically represents.
- Pulsus parvus et tardus (weak amplitude and delayed peak upstroke)Severe aortic valve stenosis
- Pulsus paradoxus (exaggerated drop in systolic blood pressure greater than 10 mmHg during inspiration)Cardiac tamponade
- Pulsus alternans (beat-to-beat alternation in pulse amplitude despite a regular rhythm)Advanced left ventricular systolic dysfunction
- Water-hammer or Corrigan pulse (rapid, bounding upstroke followed by a rapid collapse)Severe aortic valve regurgitation
- Pulsus bisferiens (biphasic pulse with two palpable systolic peaks)Hypertrophic obstructive cardiomyopathy
Answer
Pulsus parvus et tardus matches Severe aortic valve stenosis. Pulsus paradoxus matches Cardiac tamponade. Pulsus alternans matches Advanced left ventricular systolic dysfunction. Water-hammer pulse matches Severe aortic valve regurgitation. Pulsus bisferiens matches Hypertrophic obstructive cardiomyopathy.
Each arterial pulse abnormality represents a specific pathophysiological consequence of a cardiac disorder: restricted outflow in aortic stenosis (parvus et tardus), ventricular interdependence in tamponade (paradoxus), alternating contractility in heart failure (alternans), widened pulse pressure in aortic regurgitation (water-hammer), and dynamic outflow obstruction in HOCM (bisferiens).
Step-by-Step Solution
Key Concept
Abnormal arterial pulse waveforms provide direct hemodynamic evidence of specific structural heart diseases, such as fixed valvular outflow obstructions, dynamic obstructions, pericardial restraint, or primary pump failure.
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