Which of the following is a sign of autonomic dysreflexia?

• A. Severe hypertension
• B. Hypotension
• C. Bradycardia
• D. Anorexia

Answer: (A)

Autonomic dysreflexia happens when a noxious stimulus below a high spinal cord injury triggers an enormous, unchecked sympathetic response, causing a sudden and severe rise in blood pressure. The most recognizable sign is this severe hypertension, which can be life‑threatening if not treated promptly. The body may try to compensate with a slower heart rate (reflex bradycardia), but the primary and most concerning clue is the abrupt, marked increase in blood pressure.

Hypotension, anorexia, and isolated bradycardia are not the hallmark signs of autonomic dysreflexia. Bradycardia can occur as a secondary response to the hypertension, but it’s not the defining sign. In contrast, the dangerous spike in blood pressure is the key feature clinicians look for and act upon quickly to prevent complications like stroke or seizures.