Define hypertensive emergency.

• A. A mildly elevated BP with headaches.
• B. An elevated BP that is only measured in the clinic.
• C. A BP below 120/80 but with signs of hypoperfusion.
• D. A severely elevated BP with evidence of acute target organ damage.

Answer: (D)

Hypertensive emergency means the blood pressure is extremely high and there is clear evidence of acute damage to organs that the high pressure can affect, such as the brain, heart, kidneys, or eyes. In practice, this often involves systolic readings around 180 mm Hg or higher or diastolic 120 mm Hg or higher, paired with signs of target organ injury like altered mental status, stroke symptoms, chest pain from myocardial infarction, new or worsening heart failure with pulmonary edema, acute kidney injury, or retinopathy with hemorrhages. Because the organs are at immediate risk, treatment requires rapid but controlled lowering of blood pressure with intravenous medications in a monitored setting, aiming to reduce damage while avoiding too-fast drops that could worsen ischemia. This differs from hypertensive urgency, where there is no acute organ damage, and from scenarios with low blood pressure and hypoperfusion, which are not hypertensive emergencies. The option described matches the definition by emphasizing both the severe elevation and the presence of acute target organ damage.