NREMT Crash Course Practice Exam

A pulse pressure below 25% of systolic pressure is commonly associated with which condition?

Hypertension Normal Perfusion Fever Hypoperfusion

Correct Answer:

Hypoperfusion

Explanation:

Pulse pressure is the difference between systolic and diastolic pressures. When this gap is very small—specifically less than a quarter of the systolic pressure—it usually means the heart isn’t ejecting much blood and the vessels are not allowing a big rise in pressure with each beat. That pattern points to poor perfusion of tissues, or hypoperfusion, which is common in shock states such as hypovolemia or cardiogenic failure. In such cases stroke volume falls and vasoconstriction can keep diastolic pressure relatively high, narrowing the pulse pressure. So hypoperfusion best matches this finding. Hypertension often shows a wider pulse pressure, fever isn’t defined by this pattern, and normal perfusion wouldn’t present with a markedly narrowed pulse pressure.

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