What is pulse deficit and what might it indicate?

• A. When radial pulse is faster than apical pulse; indicates poor perfusion
• B. When apical pulse is faster than radial pulse; may indicate irregular rhythm or conduction abnormality like atrial fibrillation
• C. When radial pulse is absent; indicates shock
• D. Pulse deficit refers to a difference between systolic and diastolic pressures

Answer: (B)

Pulse deficit means the heart’s actual beating rate (apical pulse) is not fully reflected in the peripheral pulse (radial pulse). You determine this by counting the apical pulse with a stethoscope at the apex and the radial pulse at the wrist for a full minute and comparing the two numbers. If the apical rate is higher than the radial rate, there is a deficit.

This situation commonly occurs with irregular rhythms or conduction problems, especially atrial fibrillation, where some heartbeats don’t produce an effective peripheral pulse due to inconsistent conduction or weakened contractions. A pulse deficit can signal an abnormal rhythm or reduced cardiac efficiency and may warrant further assessment.

Why the other descriptions don’t fit: having the radial pulse faster than the apical pulse isn’t the standard definition of a pulse deficit, and an absent radial pulse points to a more acute issue like shock rather than a deficit between heart and peripheral pulse. Pulse deficit is not about the difference between systolic and diastolic pressures (that’s pulse pressure).