A 57-year-old woman arrives clutching the left side of her chest, her blouse damp with sweat and the monitor alarm chirping above a blood pressure of 238/132 mm Hg. She says the pain began 40 minutes ago and now seems to reach between her shoulder blades; she is restless but answers questions clearly. Her right arm pressure is 232/128, while the left is 198/110. The ECG is printing as the nurse calls for help, and the next move has not yet been made.

— What’s your move? Read on.

Before you read
  • What blood-pressure target and rate of reduction fit the underlying injury?
  • Which drug is safest when the emergency is aortic catastrophe, pulmonary edema, or intracranial disease?

When to Think of It

Enter hypertensive emergency when markedly elevated BP accompanies acute injury: aortic dissection, ACS, acute pulmonary edema, intracranial hemorrhage or ischemic stroke with a treatment threshold, hypertensive encephalopathy, eclampsia, or acute kidney injury. Symptoms may include chest/back pain, dyspnea, focal deficits, seizure, confusion, visual loss, or oliguria.

Sick or Not Sick

Sick vs. not sick: Is there acute end-organ injury? The key call is not “How high is the BP?” but “What organ is being injured right now, and does it require immediate controlled reduction?” Obtain bilateral arm pressures, focused neurologic/cardiopulmonary examination, ECG, glucose, renal function, urinalysis, pregnancy test when relevant, and targeted CT/echo imaging.

The First Fifteen Minutes

  • Place on cardiac/BP monitoring, obtain two IVs, repeat manual pressures, and assess airway, neurologic status, pulses, and perfusion.
  • Suspected aortic dissection with hypertension/tachycardia → esmolol 500 mcg/kg IV loading dose over 1 minute, then 50–300 mcg/kg/min infusion, because rapid β-blockade reduces contractility and aortic shear. If esmolol is unavailable, labetalol 20 mg IV over 2 minutes, then 20–80 mg IV every 10 minutes to a maximum of 300 mg, because it lowers sympathetic drive. After heart rate is controlled but BP remains high, nicardipine 5 mg/h IV infusion, increase by 2.5 mg/h every 5–15 minutes to a maximum of 15 mg/h, because vasodilation lowers wall stress; do not give vasodilator alone before β-blockade.
  • Acute pulmonary edema with severe hypertension → nitroglycerin 0.4 mg SL every 5 minutes for up to 3 doses while starting IV therapy; if persistent severe hypertension, nitroglycerin 20 mcg/min IV and titrate every 3–5 minutes, because venodilation and arterial dilation rapidly reduce preload and afterload. Avoid with recent PDE-5 inhibitor use, hypotension, or suspected right ventricular infarction.
  • Hypertensive encephalopathy or intracranial hemorrhage requiring controlled reduction → nicardipine 5 mg/h IV, titrating by 2.5 mg/h every 5–15 minutes to 15 mg/h, because it provides predictable titratable reduction without abrupt swings.
  • Pregnancy/postpartum severe hypertension, BP ≥160/110 persisting for 15 minutes → labetalol 20 mg IV, then 40 mg after 10 minutes, then 80 mg every 10 minutes to a cumulative 220 mg; or hydralazine 10 mg IV, repeat 10 mg in 20 minutes if needed, because maternal stroke risk rises rapidly. For seizure or imminent eclampsia, magnesium sulfate 4–6 g IV over 15–20 minutes, then 1–2 g/h IV, because magnesium stabilizes neuronal excitability; check reflexes, respirations, and renal function.
  • Suspected pheochromocytoma crisis after adequate α-blockade or when directed by toxicology → phentolamine 5 mg IV, repeat every 10 minutes as needed, because α-receptor blockade reverses catecholamine vasoconstriction. Never give isolated β-blockade first.

Definitive Care & Disposition

Target reduction depends on the lesion: generally no more than 20–25% of MAP in the first hour, then approximately 160/100–110 over the next 2–6 hours, unless aortic dissection, eclampsia, or a stroke protocol specifies faster control. Dissection requires immediate cardiothoracic/vascular consultation and ICU transfer; intracranial hemorrhage requires neurocritical care; pulmonary edema requires ventilatory support and ICU-level titration. Avoid oral “rescue” agents for an unstable emergency. Hypertensive urgency without injury usually needs oral medication adjustment, observation, and reliable follow-up—not rapid IV reduction.

How This One Kills

The lethal miss is treating the BP number before identifying aortic dissection, causing reflex tachycardia and increased shear with an arterial vasodilator alone—or dropping pressure so abruptly that cerebral, coronary, or renal perfusion fails.
The Differential — What Else Looks Like This
  • Pain/anxiety with severe asymptomatic hypertension — no acute end-organ injury; unnecessary IV treatment can cause ischemia and hypotension.
  • Sympathomimetic toxicity — agitation, diaphoresis, hyperthermia, and clonus; confusing it with primary hypertension misses sedation and toxicologic management.
  • Aortic dissection — abrupt tearing chest/back pain, pulse or pressure differential, new aortic regurgitation; missing it before anticoagulation or thrombolysis can be fatal.
  • Hypertensive encephalopathy — headache, confusion, seizure, or visual symptoms with vasogenic edema; confusing it with stroke can lead to the wrong BP target.

The Second-Day Story

Older adults may have little headache or chest pain and present with confusion, falls, dyspnea, or acute kidney injury. Chronic hypertension also shifts autoregulation, so a “moderate” pressure may be dangerous if it represents a sharp rise from baseline. Look for retinal hemorrhages or papilledema, altered mentation, pulmonary edema, new neurologic deficits, unequal pulses, and objective renal or cardiac injury rather than relying on symptoms alone.
Back to Our Patient
Back to the 57-year-old woman with diaphoresis, chest pain, unequal arm pressures, and severe hypertension: the trigger presentation is aortic catastrophe, so she is sick by definition. Bilateral pulses, bedside echo, and emergent CT angiography identify an acute ascending aortic dissection; while cardiothoracic surgery is mobilized, she receives esmolol to control heart rate, followed by nicardipine because pressure remains dangerously elevated. Her target is rapid reduction in shear—not normalization of a single number—and she proceeds directly to the operating room from the resuscitation area.
Patient Presentation to Attending
How you’d present this patient on the floor — tight, pertinent positives and negatives, no rambling
“This is a 57-year-old woman with abrupt chest pain radiating to the interscapular region and severe hypertension. The pain began 40 minutes ago, and she is diaphoretic but currently mentating normally; she denies fever, vomiting, and prior similar episodes. Her BP is 238/132 on the right and 198/110 on the left, with asymmetric radial pulses and a new diastolic murmur; ECG shows no STEMI. I’m concerned for acute aortic dissection with malperfusion risk rather than uncomplicated hypertension or ACS. I’ve placed her on continuous monitoring, obtained two IVs, started esmolol for heart-rate control followed by nicardipine for persistent hypertension, and activated emergent CT surgery consultation and CTA.”

Study Directive

  • Draw a one-page BP-target map for dissection, ICH, ischemic stroke, pulmonary edema, and eclampsia.
  • Memorize esmolol, labetalol, nicardipine, and nitroglycerin dosing, then practice selecting one drug for four clinical vignettes.
  • Review your institutional hypertensive-emergency and eclampsia protocols; complete five timed cases emphasizing “organ injury before number.”