Autonomic dysreflexia is most commonly associated with which type of injury or condition?

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Autonomic dysreflexia happens when a noxious or painful stimulus below a spinal cord injury triggers an unchecked sympathetic surge. This response is amplified because the injury is high enough that the brain can’t properly regulate the autonomic output below the level of injury, leading to a dangerous rise in blood pressure. It’s most commonly seen with high-level spinal cord injuries, where signals from below the injury can't be properly modulated, and a stimulus such as bladder distension or bowel impaction below the injury acts as the trigger. The other options don’t involve this mechanism: hypoglycemia is a metabolic problem; an asthma attack and a myocardial infarction are cardiopulmonary events with different pathophysiology and triggers. Recognizing the link between a high-level injury and any noxious below-injury stimulus helps you identify autonomic dysreflexia quickly and initiate relief of the trigger.