The collapsing pulse is also known as?

Appeared in: MNS 2024

Explanation

The collapsing pulse is also known by the descriptive term 'Water hammer pulse' or 'Corrigan's pulse'.
It is characterized by a very rapid and forceful upstroke followed by an equally rapid downstroke or collapse.
This pulse is a classic physical finding in patients with severe aortic regurgitation.
The rapid fall in pressure occurs as blood flows back from the aorta into the left ventricle during diastole due to an incompetent aortic valve.

Option A: An intermittent pulse refers to a rhythm disturbance where beats are occasionally dropped or skipped, which is a different finding from the forceful rise and fall of a collapsing pulse.
Option B: A bigeminal pulse describes a rhythm pattern where beats are felt in pairs (a normal beat followed by a premature one). It does not describe the quality or character of the individual pulse wave.
Option C: While a water hammer pulse is a type of bounding pulse, not all bounding pulses are water hammer pulses. A simple bounding pulse is just strong and forceful, but it lacks the characteristic sudden collapse.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Synonyms and characteristics of abnormal arterial pulses as background academic context rather than a clinical decision trigger.
Correctly identifying a water hammer pulse is a critical physical assessment skill that strongly suggests severe aortic regurgitation, prompting the nurse to anticipate orders for further investigation like an echocardiogram.
The presence of this pulse indicates a significant hemodynamic problem that can lead to heart failure if not managed.
What if? If the pulse felt weak and delayed (pulsus parvus et tardus) instead of collapsing, the nurse should suspect severe aortic stenosis, a different valvular heart disease requiring different management.

How to Approach the Question

This is a factual recall question testing knowledge of medical terminology.
Identify the key term in the question: 'collapsing pulse'.
Scan the options to find the recognized synonym for this type of pulse.
Recall that 'Water hammer pulse' is the classic synonym for a collapsing pulse, named for its distinct, sharp feel.
Eliminate the other options by recalling their definitions: intermittent (skipped beats), bigeminal (paired beats), and bounding (forceful, but not necessarily collapsing).

Concept Tested & Keywords

QrXzYozUfBclvVsZk8WTkE

E6 Medicine Macleod Clinical Examination 15e p. 61-63

E6 Medicine Harrison 22e Part 1 p. 1904-1906

E6 Physiology Review Sembulingam 5e p. 124-126

Practise the full MNS 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.