If a patient with head trauma has a slow pulse, this is most suspicious for what?

• A. rapid pulse
• B. weak pulse
• C. slow pulse
• D. irregular pulse

Answer: (C)

A slow pulse after head trauma points to brainstem involvement from rising intracranial pressure, a pattern known as Cushing’s reflex. When ICP increases, the body can respond by raising blood pressure and slowing the heart to maintain cerebral perfusion, producing bradycardia together with irregular respirations. This combination signals that intracranial pressure may be dangerously high and there’s a risk of brain herniation, which is why a slow pulse is the most suspicious finding in this scenario. Rapid pulse suggests shock or blood loss, a weak pulse indicates poor perfusion, and an irregular pulse can reflect an arrhythmia or other issues—none of these align as directly with the brainstem distress seen in this context.