HP CHO -9 October 2022
Nursing Foundation
Easy
The difference between apical and radial pulse is:
Appeared in: HP CHO -9 October 2022
Explanation
- Pulse deficit is the specific medical term for the numerical difference between the number of heartbeats counted at the apex of the heart (apical rate) and the number of pulsations felt at the radial artery (radial rate).
- It occurs when the heart contracts inefficiently, and some beats are not strong enough to transmit a pulse wave to the peripheral arteries.
- A pulse deficit is calculated by subtracting the radial rate from the apical rate (Apical Rate - Radial Rate). A deficit of zero is normal.
- This finding is a hallmark of certain cardiac arrhythmias, most commonly atrial fibrillation, where ventricular filling is variable and some contractions are too weak to perfuse.
Why Other Options Were Wrong
- Option B: Pulsus paradoxus is related to blood pressure changes with respiration, not a difference between two pulse rates.
- Option C: An auscultatory gap is a phenomenon observed during blood pressure measurement, not a pulse assessment. It is a temporary disappearance of Korotkoff sounds.
- Option D: Pulse pressure is the difference between systolic and diastolic blood pressure values, reflecting the force of contraction.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Assessment of pulse characteristics and related cardiovascular terminology as background academic context rather than a clinical decision trigger.
- Identifying a pulse deficit is a critical nursing assessment skill that can be the first sign of a serious underlying cardiac condition like atrial fibrillation or decompensated heart failure.
- Promptly reporting a new or significant pulse deficit allows for timely intervention, such as medication adjustments or further cardiac monitoring (ECG), to prevent complications like stroke or hemodynamic instability.
- What if? - If the pulse deficit was found in a patient taking digoxin, the nurse would need to hold the medication and notify the provider, as this could be a sign of digoxin toxicity, especially if accompanied by bradycardia.
How to Approach the Question
- This is a factual recall question that tests your knowledge of cardiovascular terminology.
- First, analyze the question stem. It asks for the specific term defining the 'difference between apical and radial pulse'.
- Next, evaluate each option's definition.
- Recall that 'Pulse deficit' is the exact term for the discrepancy between the heart's contractions (apical) and the palpable pulse in the periphery (radial).
- Systematically rule out the other options. 'Pulsus paradoxus', 'auscultatory gap', and 'pulse pressure' are all terms related to blood pressure measurement, not the comparison of two different pulse rates.
Concept Tested & Keywords
- Concept Tested: Assessment of pulse characteristics and related cardiovascular terminology.
- Stem keywords: apical pulse, radial pulse, difference
- Lead-in keywords: is
Question ID
QpOdJIj2SpQMIoY2y6-9fh
Reference Book
E6 Medicine Macleod Clinical Examination 15e p. 61-63
E6 Nursing Fundamentals Potter Perry 12e Part 3 p. 20-22
Practise the full HP CHO -9 October 2022
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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