17:I[462708,["/_next/static/chunks/3yo3kiro3bmlp.js","/_next/static/chunks/3vr2wvd8f2efb.js","/_next/static/chunks/2vtmb68_vu-9t.js","/_next/static/chunks/2s8mt6_8wrpfo.js","/_next/static/chunks/3vkulz2i3l61y.js","/_next/static/chunks/1cqw2i1silz0i.js","/_next/static/chunks/14dbm3lm_t629.js","/_next/static/chunks/335_v2mb569ld.js","/_next/static/chunks/3ykn5ops9bft5.js","/_next/static/chunks/3cmavum774kjt.js","/_next/static/chunks/3th-0-a2xf9qs.js","/_next/static/chunks/0p0xpwde6kzmv.js","/_next/static/chunks/401-sxxnzbtf_.js","/_next/static/chunks/0wywtv698a1v0.js","/_next/static/chunks/2botzqwpnrzyj.js"],"ArticleReader"] 18:T4d06,## Summary A hypertensive emergency is severe or rapidly rising blood pressure accompanied by **new or worsening acute hypertension-mediated target-organ injury**. The number alone does not establish the diagnosis. Acute brain injury, acute aortic syndrome, myocardial ischemia, cardiogenic pulmonary edema, acute kidney injury with a compatible syndrome, thrombotic microangiopathy, and severe hypertensive disease of pregnancy are major phenotypes.[1,2] Confirm an unexpectedly high reading with proper technique while simultaneously looking for the organ syndrome. A patient with severe blood pressure elevation but no acute target-organ injury usually does not benefit from reflexive IV treatment; observational evidence links treatment of asymptomatic inpatient elevations with hypotension, acute kidney injury, prolonged hospitalization, and other harm.[1,2] For a nonpregnant adult with hypertensive emergency **without a compelling disease-specific target**, the 2025 AHA/ACC guideline recommends reducing systolic blood pressure by **no more than 25% in the first hour**, then, if stable, to **<160/100 mmHg over the next 2–6 hours**, followed by cautious reduction toward **130–140 mmHg over the next 24–48 hours**.[1] This generic pathway does not apply to acute aortic syndrome, stroke, pregnancy, or another condition with its own target. Acute aortic syndrome requires immediate anti-impulse treatment: reduce heart rate first with an IV beta blocker when not contraindicated, then add a titratable vasodilator if needed. Target **SBP <120 mmHg or the lowest pressure that preserves end-organ perfusion**, with heart rate approximately **60–80/min**.[3] Blood-pressure strategy in stroke is diagnosis-specific. For many patients with mild-to-moderate spontaneous intracerebral hemorrhage and presenting SBP 150–220 mmHg, smooth reduction toward **140 mmHg** while maintaining approximately **130–150 mmHg** is reasonable; acute lowering below 130 mmHg may be harmful.[4] For acute ischemic stroke treated with IV thrombolysis, BP should be **<185/110 mmHg before treatment** and maintained **<180/105 mmHg afterward**. The 2026 AHA/ASA guideline advises against intensive post-thrombolysis SBP lowering below 140 mmHg and identifies intensive SBP targets below 140 mmHg after successful endovascular thrombectomy as harmful.[5] Use short-acting, titratable IV agents in a monitored setting for true emergencies. Nicardipine, clevidipine, labetalol, esmolol, and nitroglycerin have different organ-specific roles; drug selection should follow the disease rather than a universal preference.[1] ## Definition Hypertensive emergency requires both: 1. Markedly elevated or rapidly rising blood pressure, often but not always >180/120 mmHg; and 2. Acute target-organ injury attributable to the pressure state. The same pressure can have different consequences depending on baseline hypertension and autoregulatory adaptation. A chronically hypertensive patient may tolerate a level that causes encephalopathy in a previously normotensive patient, while a person with acute aortic dissection may need urgent treatment at a pressure below traditional “crisis” thresholds. The term **severe asymptomatic hypertension** is preferable when there is no acute organ injury. Older terminology implying an emergency from the number alone can lead to unnecessary rapid treatment.[1,2] ## Pathophysiology When arterial pressure exceeds autoregulatory capacity, endothelial injury, increased vascular permeability, arteriolar necrosis, platelet activation, and tissue ischemia can create a cycle of vasoconstriction and further pressure elevation. The affected vascular bed determines the phenotype. Rapid overcorrection can be equally dangerous. In chronic hypertension, autoregulatory curves shift upward; abrupt reduction can compromise cerebral, coronary, spinal, renal, or placental perfusion. The goal is controlled reduction to a syndrome-specific target, not immediate normalization. ## Acute target-organ syndromes | Syndrome | Key findings | Immediate priority | |---|---|---| | Hypertensive encephalopathy / posterior reversible encephalopathy syndrome | Headache, confusion, seizures, visual disturbance, diffuse neurologic dysfunction | Brain imaging, titratable BP reduction, seizure control | | Spontaneous intracerebral hemorrhage | Focal deficit, headache, vomiting, reduced responsiveness | CT brain, ICH-specific BP target, anticoagulant reversal when relevant | | Acute ischemic stroke | Sudden focal deficit | Stroke reperfusion pathway; avoid generic BP targets | | Acute aortic syndrome | Abrupt severe chest/back/abdominal pain, pulse deficit, malperfusion, new aortic regurgitation | Immediate anti-impulse therapy and definitive aortic team involvement | | Acute coronary syndrome | Ischemic pain, dynamic ECG or troponin findings | ACS therapy while avoiding excessive fall in diastolic pressure | | Acute cardiogenic pulmonary edema | Severe dyspnea, hypoxemia, diffuse crackles, pulmonary congestion | Noninvasive respiratory support when appropriate and rapid afterload reduction | | Acute kidney injury / malignant hypertension phenotype | Rising creatinine, hematuria/proteinuria, oliguria, retinal injury | Controlled pressure reduction; assess secondary causes and TMA | | Thrombotic microangiopathy | Hemolytic anemia, thrombocytopenia, kidney injury, severe hypertension | Distinguish pressure-mediated TMA from primary TMA; urgent specialist input | | Severe hypertensive disease of pregnancy | Pregnancy/postpartum state with severe hypertension ± neurologic, hepatic, renal, hematologic, or pulmonary features | Obstetric emergency pathway, rapid antihypertensive therapy, magnesium when indicated | ## Immediate assessment ### Confirm the pressure correctly - Use the correct cuff size and supported arm position. - Repeat the measurement after a short interval when clinically safe. - Check both arms if acute aortic syndrome is plausible. - Review pain, agitation, withdrawal, hypoxia, urinary retention, missed medications, and stimulant exposure. Do not delay treatment in a patient with a clear life-threatening organ syndrome while repeating measurements indefinitely. ### Focused history Ask about: - Time of symptom onset and previous blood-pressure range - Known hypertension and medication adherence - Clonidine or beta-blocker interruption - Cocaine, amphetamine, sympathomimetic, monoamine oxidase inhibitor, or other pressor exposure - Pregnancy or postpartum status - Kidney disease, renovascular disease, endocrine disease, vascular disease - Chest/back pain, neurologic symptoms, dyspnea, vision change, oliguria - Recent surgery or transplant ### Focused physical assessment - Mental status and focal neurologic deficits - Pupils and visual symptoms - Pulse symmetry and limb perfusion - New aortic regurgitation murmur - Heart failure signs and pulmonary congestion - Volume status - Retinal hemorrhage, exudate, or optic-disc edema when fundus visualization is feasible - Pregnancy-related features when relevant ## Diagnostic testing Testing is organ-directed rather than a fixed panel. | Clinical concern | Tests | |---|---| | Any true emergency | ECG, electrolytes, creatinine, glucose, CBC, urinalysis; continuous cardiac monitoring | | Acute coronary syndrome | Serial ECG and cardiac troponin | | Pulmonary edema | Chest radiograph, lung ultrasound, natriuretic peptide when useful, echocardiography according to severity | | Neurologic syndrome | Urgent noncontrast CT brain; vascular or perfusion imaging according to stroke pathway | | Acute aortic syndrome | CT angiography of the aorta when stable; transesophageal echocardiography or another rapid modality when CT is unsuitable | | TMA | CBC, smear, LDH, haptoglobin, bilirubin, reticulocytes, coagulation profile; ADAMTS13 testing when primary TTP is plausible | | Pregnancy-related disease | Platelets, AST/ALT, creatinine, urine protein assessment, fetal/obstetric evaluation according to gestation | | Secondary hypertension after stabilization | Aldosterone/renin, metanephrines, renal imaging, endocrine studies as clinically indicated | ## General treatment pathway 1. Identify the organ syndrome. 2. Place true hypertensive emergencies in a monitored setting; ICU-level care is usual when continuous titration is required.[1] 3. Establish IV access and continuous ECG monitoring. 4. Use an arterial line when beat-to-beat titration is important, especially acute aortic syndrome, severe neurologic injury, or highly labile pressure. 5. Choose a short-acting IV drug matched to the organ syndrome. 6. Use the disease-specific target if one exists; otherwise use controlled staged reduction. 7. Reassess symptoms, perfusion, neurologic state, urine output, and renal function during titration. 8. Treat the precipitant: withdrawal, stimulant toxicity, renal failure, pain, endocrine crisis, or medication interruption. ## Blood-pressure targets by syndrome | Syndrome | Target / pace | Preferred approach | Important cautions | |---|---|---|---| | No compelling disease-specific target | SBP reduction no more than 25% in first hour; then <160/100 mmHg over next 2–6 h; then 130–140 mmHg over 24–48 h if stable[1] | Nicardipine, clevidipine, or labetalol are common choices | Avoid overshoot hypotension and rapid normalization | | Acute aortic syndrome | SBP <120 mmHg or lowest preserving organ perfusion; HR 60–80/min[3] | IV esmolol or labetalol first; then nicardipine, clevidipine, or another vasodilator if needed | Do not give a pure vasodilator before rate control when reflex tachycardia would increase shear stress | | Mild–moderate spontaneous ICH with SBP 150–220 | Target about 140; maintain about 130–150[4] | Smooth continuous titration, commonly nicardipine or clevidipine | SBP <130 may be harmful; individualize massive ICH or threatened cerebral perfusion | | Acute ischemic stroke before IV thrombolysis | <185/110 mmHg[5] | Stroke protocol with labetalol, nicardipine, or clevidipine | Do not delay eligible reperfusion unnecessarily | | Acute ischemic stroke after IV thrombolysis | Maintain <180/105 mmHg; avoid intensive SBP <140[5] | Smooth control and frequent neurologic monitoring | Intensive <140 offers no functional benefit | | After successful endovascular thrombectomy | Avoid intensive SBP <140 in absence of another indication[5] | Stroke-team target based on reperfusion and vascular anatomy | <140 after successful reperfusion can worsen functional outcome | | Hypertensive acute pulmonary edema | Prompt afterload reduction while preserving perfusion | IV nitroglycerin is often favored; NIV when appropriate | Avoid reflex fluid loading; do not newly intensify beta blockade during unstable pulmonary edema | | Acute coronary syndrome with severe hypertension | Relieve ischemia and reduce afterload without compromising coronary perfusion | Nitroglycerin plus syndrome-specific ACS therapy | Avoid excessive fall in diastolic pressure; nitrates contraindicated with certain phosphodiesterase-5 inhibitor exposure | | Severe hypertension in pregnancy | Follow obstetric pathway; acute severe BP requires prompt treatment | IV labetalol, IV hydralazine, or immediate-release oral nifedipine are standard pathway agents | Pregnancy targets and magnesium indications differ from nonpregnant care | ## IV antihypertensive drugs Doses below are common adult regimens; use current local labeling and protocol. | Drug | Common adult IV regimen | Best fit | Important cautions | |---|---|---|---| | Nicardipine | 5 mg/h; increase by 2.5 mg/h every 5–15 min to usual max 15 mg/h | Neurologic emergencies, broad titratable use | Reflex tachycardia, phlebitis, fluid load | | Clevidipine | 1–2 mg/h; titrate by doubling at short intervals, then smaller increments; usual effective range 4–6 mg/h, max per label 32 mg/h | Rapid arterial titration, neurologic settings | Lipid emulsion; avoid in severe lipid disorders and certain egg/soy hypersensitivity settings per label | | Labetalol | 20 mg IV over 2 min, then 40–80 mg every 10 min as needed, or infusion per protocol | Stroke, pregnancy, selected aortic cases | Bradycardia, heart block, bronchospasm, decompensated heart failure | | Esmolol | 500 mcg/kg loading dose over 1 min, then 50 mcg/kg/min; titrate by protocol | Acute aortic syndrome because of very short half-life | Bradycardia, heart block, shock | | Nitroglycerin | Start about 5 mcg/min and titrate rapidly to response | Acute pulmonary edema, coronary ischemia | Headache, tachyphylaxis, hypotension, phosphodiesterase-5 inhibitor interaction | | Sodium nitroprusside | 0.3–0.5 mcg/kg/min, titrated carefully | Selected refractory cases with invasive monitoring | Cyanide/thiocyanate toxicity, light sensitivity, increased intracranial pressure; less favored when alternatives exist | ### Why oral short-acting drugs are usually wrong in true emergency True hypertensive emergency requires predictable, titratable control. Sublingual nifedipine and other poorly controllable rapid oral approaches can cause abrupt hypotension and ischemia and should not be used to “normalize” pressure quickly. ## Syndrome-specific management ### Hypertensive encephalopathy After excluding hemorrhage, large ischemic stroke, toxic/metabolic causes, and other structural disease, reduce pressure with a titratable IV agent using the generic staged pathway when no competing target exists. Neurologic improvement as pressure falls supports the diagnosis. MRI is useful when posterior reversible encephalopathy syndrome is suspected and CT is nondiagnostic. ### Acute aortic syndrome Treatment begins before definitive imaging results when clinical probability is very high and there is no contraindication to anti-impulse therapy.[3] 1. Provide adequate analgesia. 2. Start IV beta blockade to lower heart rate and aortic dP/dt. 3. Target HR 60–80/min and SBP <120 mmHg or the lowest level that maintains organ perfusion. 4. If SBP remains high after rate control, add a titratable arterial vasodilator. 5. Obtain urgent aortic surgical/endovascular consultation. > **Caution:** A vasodilator given before adequate rate control can provoke reflex tachycardia and increase aortic wall shear. ### Acute cardiogenic pulmonary edema In markedly hypertensive pulmonary edema, afterload excess can dominate the physiology. Management may include: - Noninvasive positive-pressure ventilation for appropriate patients - Rapidly titrated IV nitroglycerin - Loop diuretic when true volume overload is present - Evaluation for acute coronary syndrome, valvular disease, and mechanical complications A patient with flash pulmonary edema may be severely afterload-sensitive without major total-body fluid excess. ### Sympathetic drug or catecholamine crisis For cocaine or amphetamine toxicity, reduce central sympathetic drive with benzodiazepines when appropriate and use vasodilator therapy if severe hypertension persists. For pheochromocytoma crisis, alpha-directed therapy is central; avoid isolated beta blockade before adequate alpha blockade because it can worsen vasoconstriction. ### Kidney injury and TMA Severe hypertension can itself cause microangiopathic hemolysis and kidney injury, but primary thrombotic thrombocytopenic purpura can also present with severe pressure elevation. Profound thrombocytopenia, severe ADAMTS13 deficiency, prominent neurologic findings, and hemolysis out of proportion to the pressure syndrome should increase concern for primary TTP and trigger urgent hematology involvement. ## Severe asymptomatic hypertension A severely elevated inpatient or emergency-department reading without acute target-organ injury is **not** a hypertensive emergency.[1,2] Approach: - Repeat measurement using proper technique. - Treat pain, anxiety, hypoxia, withdrawal, urinary retention, or other reversible stressors. - Resume interrupted chronic medications when appropriate. - Avoid intermittent IV treatment or aggressive short-acting oral “rescue” dosing solely for the number. - Plan longitudinal treatment adjustment and timely outpatient follow-up. The 2025 AHA/ACC guideline notes that spontaneous BP reduction occurs commonly in hospitalized patients and that additional intermittent antihypertensive treatment in asymptomatic patients has been associated with acute kidney injury, mortality, and prolonged stay.[1] ## Monitoring and transition to oral therapy During IV titration monitor: - Continuous or very frequent BP - Neurologic state - Heart rate and rhythm - Urine output and creatinine - Signs of myocardial, cerebral, spinal, renal, or limb hypoperfusion - Disease-specific endpoints such as chest pain, pulmonary edema, or encephalopathy Once the acute organ syndrome is stable and BP has remained in the intended range, introduce or resume a durable oral regimen and taper the IV infusion gradually. Evaluate adherence, interacting medications, kidney function, and secondary causes before discharge. ## Disposition True hypertensive emergency generally requires admission to a monitored unit. ICU care is particularly appropriate for continuous infusion, acute aortic syndrome, intracranial hemorrhage, acute ischemic stroke receiving reperfusion therapy, severe pulmonary edema, unstable coronary disease, pregnancy-related severe disease, or rapidly evolving kidney/TMA syndromes. Discharge directly from acute care is reasonable only when acute target-organ injury has been excluded, pressure is stable enough for outpatient management, a safe oral plan exists, and follow-up is reliable. ## Cross-links - [Primary Hypertension in Adults](../cardiology/primary-hypertension-in-adults.md) - [Acute Aortic Syndrome](../cardiology/acute-aortic-syndrome.md) - [Acute Ischemic Stroke](../neurology/acute-ischemic-stroke.md) - [Spontaneous Intracerebral Hemorrhage](../neurology/spontaneous-intracerebral-hemorrhage.md) - [Acute Coronary Syndrome](../cardiology/acute-coronary-syndrome.md) - [Acute Decompensated Heart Failure](../cardiology/acute-decompensated-heart-failure.md) - [Preeclampsia and Eclampsia](../obstetrics-gynecology/preeclampsia-and-eclampsia.md) ## References 1. American Heart Association, American College of Cardiology, et al. **2025 Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults.** *Circulation.* 2025. doi:10.1161/CIR.0000000000001356. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001356 2. Bress AP, Anderson TS, Flack JM, et al. **The Management of Elevated Blood Pressure in the Acute Care Setting: A Scientific Statement From the American Heart Association.** *Hypertension.* 2024;81:e94-e106. doi:10.1161/HYP.0000000000000238. https://www.ahajournals.org/doi/10.1161/HYP.0000000000000238 3. Isselbacher EM, Preventza O, Hamilton Black J III, et al. **2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease.** *Circulation.* 2022;146:e334-e482. doi:10.1161/CIR.0000000000001106. PMID:36322642. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001106 4. Greenberg SM, Ziai WC, Cordonnier C, et al. **2022 Guideline for the Management of Patients With Spontaneous Intracerebral Hemorrhage.** *Stroke.* 2022;53:e282-e361. doi:10.1161/STR.0000000000000407. PMID:35579034. https://www.ahajournals.org/doi/10.1161/STR.0000000000000407 5. Prabhakaran S, Gonzalez NR, Zachrison KS, et al. **2026 Guideline for the Early Management of Patients With Acute Ischemic Stroke.** *Stroke.* 2026;57:e316-e436. doi:10.1161/STR.0000000000000513. https://www.ahajournals.org/doi/10.1161/STR.000000000000051319:T4d6c,## Summary A hypertensive emergency is severe or rapidly rising blood pressure accompanied by **new or worsening acute hypertension-mediated target-organ injury**. The number alone does not establish the diagnosis. Acute brain injury, acute aortic syndrome, myocardial ischemia, cardiogenic pulmonary edema, [acute kidney injury](/library/acute-kidney-injury) with a compatible syndrome, thrombotic microangiopathy, and severe hypertensive disease of pregnancy are major phenotypes.[1,2] Confirm an unexpectedly high reading with proper technique while simultaneously looking for the organ syndrome. A patient with severe blood pressure elevation but no acute target-organ injury usually does not benefit from reflexive IV treatment; observational evidence links treatment of asymptomatic inpatient elevations with hypotension, acute kidney injury, prolonged hospitalization, and other harm.[1,2] For a nonpregnant adult with hypertensive emergency **without a compelling disease-specific target**, the 2025 AHA/ACC guideline recommends reducing systolic blood pressure by **no more than 25% in the first hour**, then, if stable, to **<160/100 mmHg over the next 2–6 hours**, followed by cautious reduction toward **130–140 mmHg over the next 24–48 hours**.[1] This generic pathway does not apply to acute aortic syndrome, stroke, pregnancy, or another condition with its own target. Acute aortic syndrome requires immediate anti-impulse treatment: reduce heart rate first with an IV beta blocker when not contraindicated, then add a titratable vasodilator if needed. Target **SBP <120 mmHg or the lowest pressure that preserves end-organ perfusion**, with heart rate approximately **60–80/min**.[3] Blood-pressure strategy in stroke is diagnosis-specific. For many patients with mild-to-moderate spontaneous intracerebral hemorrhage and presenting SBP 150–220 mmHg, smooth reduction toward **140 mmHg** while maintaining approximately **130–150 mmHg** is reasonable; acute lowering below 130 mmHg may be harmful.[4] For [acute ischemic stroke](/library/acute-ischemic-stroke) treated with IV thrombolysis, BP should be **<185/110 mmHg before treatment** and maintained **<180/105 mmHg afterward**. The 2026 AHA/ASA guideline advises against intensive post-thrombolysis SBP lowering below 140 mmHg and identifies intensive SBP targets below 140 mmHg after successful endovascular thrombectomy as harmful.[5] Use short-acting, titratable IV agents in a monitored setting for true emergencies. Nicardipine, clevidipine, labetalol, esmolol, and nitroglycerin have different organ-specific roles; drug selection should follow the disease rather than a universal preference.[1] ## Definition Hypertensive emergency requires both: 1. Markedly elevated or rapidly rising blood pressure, often but not always >180/120 mmHg; and 2. Acute target-organ injury attributable to the pressure state. The same pressure can have different consequences depending on baseline hypertension and autoregulatory adaptation. A chronically hypertensive patient may tolerate a level that causes encephalopathy in a previously normotensive patient, while a person with acute aortic dissection may need urgent treatment at a pressure below traditional “crisis” thresholds. The term **severe asymptomatic hypertension** is preferable when there is no acute organ injury. Older terminology implying an emergency from the number alone can lead to unnecessary rapid treatment.[1,2] ## Pathophysiology When arterial pressure exceeds autoregulatory capacity, endothelial injury, increased vascular permeability, arteriolar necrosis, platelet activation, and tissue ischemia can create a cycle of vasoconstriction and further pressure elevation. The affected vascular bed determines the phenotype. Rapid overcorrection can be equally dangerous. In chronic hypertension, autoregulatory curves shift upward; abrupt reduction can compromise cerebral, coronary, spinal, renal, or placental perfusion. The goal is controlled reduction to a syndrome-specific target, not immediate normalization. ## Acute target-organ syndromes | Syndrome | Key findings | Immediate priority | |---|---|---| | Hypertensive encephalopathy / posterior reversible encephalopathy syndrome | Headache, confusion, seizures, visual disturbance, diffuse neurologic dysfunction | Brain imaging, titratable BP reduction, seizure control | | Spontaneous intracerebral hemorrhage | Focal deficit, headache, vomiting, reduced responsiveness | CT brain, ICH-specific BP target, anticoagulant reversal when relevant | | Acute ischemic stroke | Sudden focal deficit | Stroke reperfusion pathway; avoid generic BP targets | | Acute aortic syndrome | Abrupt severe chest/back/abdominal pain, pulse deficit, malperfusion, new aortic regurgitation | Immediate anti-impulse therapy and definitive aortic team involvement | | [Acute coronary syndrome](/library/acute-coronary-syndrome) | Ischemic pain, dynamic ECG or troponin findings | ACS therapy while avoiding excessive fall in diastolic pressure | | Acute cardiogenic pulmonary edema | Severe dyspnea, hypoxemia, diffuse crackles, pulmonary congestion | Noninvasive respiratory support when appropriate and rapid afterload reduction | | Acute kidney injury / malignant hypertension phenotype | Rising creatinine, hematuria/proteinuria, oliguria, retinal injury | Controlled pressure reduction; assess secondary causes and TMA | | Thrombotic microangiopathy | Hemolytic anemia, thrombocytopenia, kidney injury, severe hypertension | Distinguish pressure-mediated TMA from primary TMA; urgent specialist input | | Severe hypertensive disease of pregnancy | Pregnancy/postpartum state with severe hypertension ± neurologic, hepatic, renal, hematologic, or pulmonary features | Obstetric emergency pathway, rapid antihypertensive therapy, magnesium when indicated | ## Immediate assessment ### Confirm the pressure correctly - Use the correct cuff size and supported arm position. - Repeat the measurement after a short interval when clinically safe. - Check both arms if acute aortic syndrome is plausible. - Review pain, agitation, withdrawal, hypoxia, urinary retention, missed medications, and stimulant exposure. Do not delay treatment in a patient with a clear life-threatening organ syndrome while repeating measurements indefinitely. ### Focused history Ask about: - Time of symptom onset and previous blood-pressure range - Known hypertension and medication adherence - Clonidine or beta-blocker interruption - Cocaine, amphetamine, sympathomimetic, monoamine oxidase inhibitor, or other pressor exposure - Pregnancy or postpartum status - Kidney disease, renovascular disease, endocrine disease, vascular disease - Chest/back pain, neurologic symptoms, dyspnea, vision change, oliguria - Recent surgery or transplant ### Focused physical assessment - Mental status and focal neurologic deficits - Pupils and visual symptoms - Pulse symmetry and limb perfusion - New aortic regurgitation murmur - Heart failure signs and pulmonary congestion - Volume status - Retinal hemorrhage, exudate, or optic-disc edema when fundus visualization is feasible - Pregnancy-related features when relevant ## Diagnostic testing Testing is organ-directed rather than a fixed panel. | Clinical concern | Tests | |---|---| | Any true emergency | ECG, electrolytes, creatinine, glucose, CBC, urinalysis; continuous cardiac monitoring | | Acute coronary syndrome | Serial ECG and cardiac troponin | | Pulmonary edema | Chest radiograph, lung ultrasound, natriuretic peptide when useful, echocardiography according to severity | | Neurologic syndrome | Urgent noncontrast CT brain; vascular or perfusion imaging according to stroke pathway | | Acute aortic syndrome | CT angiography of the aorta when stable; transesophageal echocardiography or another rapid modality when CT is unsuitable | | TMA | CBC, smear, LDH, haptoglobin, bilirubin, reticulocytes, coagulation profile; ADAMTS13 testing when primary TTP is plausible | | Pregnancy-related disease | Platelets, AST/ALT, creatinine, urine protein assessment, fetal/obstetric evaluation according to gestation | | Secondary hypertension after stabilization | Aldosterone/renin, metanephrines, renal imaging, endocrine studies as clinically indicated | ## General treatment pathway 1. Identify the organ syndrome. 2. Place true hypertensive emergencies in a monitored setting; ICU-level care is usual when continuous titration is required.[1] 3. Establish IV access and continuous ECG monitoring. 4. Use an arterial line when beat-to-beat titration is important, especially acute aortic syndrome, severe neurologic injury, or highly labile pressure. 5. Choose a short-acting IV drug matched to the organ syndrome. 6. Use the disease-specific target if one exists; otherwise use controlled staged reduction. 7. Reassess symptoms, perfusion, neurologic state, urine output, and renal function during titration. 8. Treat the precipitant: withdrawal, stimulant toxicity, renal failure, pain, endocrine crisis, or medication interruption. ## Blood-pressure targets by syndrome | Syndrome | Target / pace | Preferred approach | Important cautions | |---|---|---|---| | No compelling disease-specific target | SBP reduction no more than 25% in first hour; then <160/100 mmHg over next 2–6 h; then 130–140 mmHg over 24–48 h if stable[1] | Nicardipine, clevidipine, or labetalol are common choices | Avoid overshoot hypotension and rapid normalization | | Acute aortic syndrome | SBP <120 mmHg or lowest preserving organ perfusion; HR 60–80/min[3] | IV esmolol or labetalol first; then nicardipine, clevidipine, or another vasodilator if needed | Do not give a pure vasodilator before rate control when reflex tachycardia would increase shear stress | | Mild–moderate spontaneous ICH with SBP 150–220 | Target about 140; maintain about 130–150[4] | Smooth continuous titration, commonly nicardipine or clevidipine | SBP <130 may be harmful; individualize massive ICH or threatened cerebral perfusion | | Acute ischemic stroke before IV thrombolysis | <185/110 mmHg[5] | Stroke protocol with labetalol, nicardipine, or clevidipine | Do not delay eligible reperfusion unnecessarily | | Acute ischemic stroke after IV thrombolysis | Maintain <180/105 mmHg; avoid intensive SBP <140[5] | Smooth control and frequent neurologic monitoring | Intensive <140 offers no functional benefit | | After successful endovascular thrombectomy | Avoid intensive SBP <140 in absence of another indication[5] | Stroke-team target based on reperfusion and vascular anatomy | <140 after successful reperfusion can worsen functional outcome | | Hypertensive acute pulmonary edema | Prompt afterload reduction while preserving perfusion | IV nitroglycerin is often favored; NIV when appropriate | Avoid reflex fluid loading; do not newly intensify beta blockade during unstable pulmonary edema | | Acute coronary syndrome with severe hypertension | Relieve ischemia and reduce afterload without compromising coronary perfusion | Nitroglycerin plus syndrome-specific ACS therapy | Avoid excessive fall in diastolic pressure; nitrates contraindicated with certain phosphodiesterase-5 inhibitor exposure | | Severe hypertension in pregnancy | Follow obstetric pathway; acute severe BP requires prompt treatment | IV labetalol, IV hydralazine, or immediate-release oral nifedipine are standard pathway agents | Pregnancy targets and magnesium indications differ from nonpregnant care | ## IV antihypertensive drugs Doses below are common adult regimens; use current local labeling and protocol. | Drug | Common adult IV regimen | Best fit | Important cautions | |---|---|---|---| | Nicardipine | 5 mg/h; increase by 2.5 mg/h every 5–15 min to usual max 15 mg/h | Neurologic emergencies, broad titratable use | Reflex tachycardia, phlebitis, fluid load | | Clevidipine | 1–2 mg/h; titrate by doubling at short intervals, then smaller increments; usual effective range 4–6 mg/h, max per label 32 mg/h | Rapid arterial titration, neurologic settings | Lipid emulsion; avoid in severe lipid disorders and certain egg/soy hypersensitivity settings per label | | Labetalol | 20 mg IV over 2 min, then 40–80 mg every 10 min as needed, or infusion per protocol | Stroke, pregnancy, selected aortic cases | Bradycardia, heart block, bronchospasm, decompensated heart failure | | Esmolol | 500 mcg/kg loading dose over 1 min, then 50 mcg/kg/min; titrate by protocol | Acute aortic syndrome because of very short half-life | Bradycardia, heart block, shock | | Nitroglycerin | Start about 5 mcg/min and titrate rapidly to response | Acute pulmonary edema, coronary ischemia | Headache, tachyphylaxis, hypotension, phosphodiesterase-5 inhibitor interaction | | Sodium nitroprusside | 0.3–0.5 mcg/kg/min, titrated carefully | Selected refractory cases with invasive monitoring | Cyanide/thiocyanate toxicity, light sensitivity, increased intracranial pressure; less favored when alternatives exist | ### Why oral short-acting drugs are usually wrong in true emergency True hypertensive emergency requires predictable, titratable control. Sublingual nifedipine and other poorly controllable rapid oral approaches can cause abrupt hypotension and ischemia and should not be used to “normalize” pressure quickly. ## Syndrome-specific management ### Hypertensive encephalopathy After excluding hemorrhage, large ischemic stroke, toxic/metabolic causes, and other structural disease, reduce pressure with a titratable IV agent using the generic staged pathway when no competing target exists. Neurologic improvement as pressure falls supports the diagnosis. MRI is useful when posterior reversible encephalopathy syndrome is suspected and CT is nondiagnostic. ### Acute aortic syndrome Treatment begins before definitive imaging results when clinical probability is very high and there is no contraindication to anti-impulse therapy.[3] 1. Provide adequate analgesia. 2. Start IV beta blockade to lower heart rate and aortic dP/dt. 3. Target HR 60–80/min and SBP <120 mmHg or the lowest level that maintains organ perfusion. 4. If SBP remains high after rate control, add a titratable arterial vasodilator. 5. Obtain urgent aortic surgical/endovascular consultation. > **Caution:** A vasodilator given before adequate rate control can provoke reflex tachycardia and increase aortic wall shear. ### Acute cardiogenic pulmonary edema In markedly hypertensive pulmonary edema, afterload excess can dominate the physiology. Management may include: - Noninvasive positive-pressure ventilation for appropriate patients - Rapidly titrated IV nitroglycerin - Loop diuretic when true volume overload is present - Evaluation for acute coronary syndrome, valvular disease, and mechanical complications A patient with flash pulmonary edema may be severely afterload-sensitive without major total-body fluid excess. ### Sympathetic drug or catecholamine crisis For cocaine or amphetamine toxicity, reduce central sympathetic drive with benzodiazepines when appropriate and use vasodilator therapy if severe hypertension persists. For pheochromocytoma crisis, alpha-directed therapy is central; avoid isolated beta blockade before adequate alpha blockade because it can worsen vasoconstriction. ### Kidney injury and TMA Severe hypertension can itself cause microangiopathic hemolysis and kidney injury, but primary thrombotic thrombocytopenic purpura can also present with severe pressure elevation. Profound thrombocytopenia, severe ADAMTS13 deficiency, prominent neurologic findings, and hemolysis out of proportion to the pressure syndrome should increase concern for primary TTP and trigger urgent hematology involvement. ## Severe asymptomatic hypertension A severely elevated inpatient or emergency-department reading without acute target-organ injury is **not** a hypertensive emergency.[1,2] Approach: - Repeat measurement using proper technique. - Treat pain, anxiety, hypoxia, withdrawal, urinary retention, or other reversible stressors. - Resume interrupted chronic medications when appropriate. - Avoid intermittent IV treatment or aggressive short-acting oral “rescue” dosing solely for the number. - Plan longitudinal treatment adjustment and timely outpatient follow-up. The 2025 AHA/ACC guideline notes that spontaneous BP reduction occurs commonly in hospitalized patients and that additional intermittent antihypertensive treatment in asymptomatic patients has been associated with acute kidney injury, mortality, and prolonged stay.[1] ## Monitoring and transition to oral therapy During IV titration monitor: - Continuous or very frequent BP - Neurologic state - Heart rate and rhythm - Urine output and creatinine - Signs of myocardial, cerebral, spinal, renal, or limb hypoperfusion - Disease-specific endpoints such as chest pain, pulmonary edema, or encephalopathy Once the acute organ syndrome is stable and BP has remained in the intended range, introduce or resume a durable oral regimen and taper the IV infusion gradually. Evaluate adherence, interacting medications, kidney function, and secondary causes before discharge. ## Disposition True hypertensive emergency generally requires admission to a monitored unit. ICU care is particularly appropriate for continuous infusion, acute aortic syndrome, intracranial hemorrhage, acute ischemic stroke receiving reperfusion therapy, severe pulmonary edema, unstable coronary disease, pregnancy-related severe disease, or rapidly evolving kidney/TMA syndromes. Discharge directly from acute care is reasonable only when acute target-organ injury has been excluded, pressure is stable enough for outpatient management, a safe oral plan exists, and follow-up is reliable. ## Cross-links - [Primary Hypertension in Adults](../cardiology/primary-hypertension-in-adults.md) - [Acute Aortic Syndrome](../cardiology/acute-aortic-syndrome.md) - [Acute Ischemic Stroke](../neurology/acute-ischemic-stroke.md) - [Spontaneous Intracerebral Hemorrhage](../neurology/spontaneous-intracerebral-hemorrhage.md) - [Acute Coronary Syndrome](../cardiology/acute-coronary-syndrome.md) - [Acute Decompensated Heart Failure](../cardiology/acute-decompensated-heart-failure.md) - [Preeclampsia and Eclampsia](../obstetrics-gynecology/preeclampsia-and-eclampsia.md) ## References 1. American Heart Association, American College of Cardiology, et al. **2025 Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults.** *Circulation.* 2025. doi:10.1161/CIR.0000000000001356. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001356 2. Bress AP, Anderson TS, Flack JM, et al. **The Management of Elevated Blood Pressure in the Acute Care Setting: A Scientific Statement From the American Heart Association.** *Hypertension.* 2024;81:e94-e106. doi:10.1161/HYP.0000000000000238. https://www.ahajournals.org/doi/10.1161/HYP.0000000000000238 3. Isselbacher EM, Preventza O, Hamilton Black J III, et al. **2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease.** *Circulation.* 2022;146:e334-e482. doi:10.1161/CIR.0000000000001106. PMID:36322642. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001106 4. Greenberg SM, Ziai WC, Cordonnier C, et al. **2022 Guideline for the Management of Patients With Spontaneous Intracerebral Hemorrhage.** *Stroke.* 2022;53:e282-e361. doi:10.1161/STR.0000000000000407. PMID:35579034. https://www.ahajournals.org/doi/10.1161/STR.0000000000000407 5. Prabhakaran S, Gonzalez NR, Zachrison KS, et al. **2026 Guideline for the Early Management of Patients With Acute Ischemic Stroke.** *Stroke.* 2026;57:e316-e436. doi:10.1161/STR.0000000000000513. https://www.ahajournals.org/doi/10.1161/STR.00000000000005137:["$","$L17",null,{"article":{"id":"medical-hypertensive-emergencies","title":"Hypertensive Emergencies","slug":"hypertensive-emergencies","description":"A hypertensive emergency is severe or rapidly rising blood pressure accompanied by new or worsening acute hypertension-mediated target-organ injury. The number alone does not establish the diagnosis. Acute brain injur…","aliases":[],"category":"Emergency Medicine","tags":["Emergency Medicine"],"updatedAt":"$undefined","body":"$18","headings":[{"id":"summary","text":"Summary","level":2},{"id":"definition","text":"Definition","level":2},{"id":"pathophysiology","text":"Pathophysiology","level":2},{"id":"acute-target-organ-syndromes","text":"Acute target-organ syndromes","level":2},{"id":"immediate-assessment","text":"Immediate assessment","level":2},{"id":"confirm-the-pressure-correctly","text":"Confirm the pressure correctly","level":3},{"id":"focused-history","text":"Focused history","level":3},{"id":"focused-physical-assessment","text":"Focused physical assessment","level":3},{"id":"diagnostic-testing","text":"Diagnostic testing","level":2},{"id":"general-treatment-pathway","text":"General treatment pathway","level":2},{"id":"blood-pressure-targets-by-syndrome","text":"Blood-pressure targets by syndrome","level":2},{"id":"iv-antihypertensive-drugs","text":"IV antihypertensive drugs","level":2},{"id":"why-oral-short-acting-drugs-are-usually-wrong-in-true-emergency","text":"Why oral short-acting drugs are usually wrong in true emergency","level":3},{"id":"syndrome-specific-management","text":"Syndrome-specific management","level":2},{"id":"hypertensive-encephalopathy","text":"Hypertensive encephalopathy","level":3},{"id":"acute-aortic-syndrome","text":"Acute aortic syndrome","level":3},{"id":"acute-cardiogenic-pulmonary-edema","text":"Acute cardiogenic pulmonary edema","level":3},{"id":"sympathetic-drug-or-catecholamine-crisis","text":"Sympathetic drug or catecholamine crisis","level":3},{"id":"kidney-injury-and-tma","text":"Kidney injury and TMA","level":3},{"id":"severe-asymptomatic-hypertension","text":"Severe asymptomatic hypertension","level":2},{"id":"monitoring-and-transition-to-oral-therapy","text":"Monitoring and transition to oral therapy","level":2},{"id":"disposition","text":"Disposition","level":2},{"id":"cross-links","text":"Cross-links","level":2},{"id":"references","text":"References","level":2}],"readingMinutes":12},"linkedMarkdown":"$19","backlinks":[],"related":[],"previewBySlug":{"abcde-approach":{"title":"ABCDE Approach","description":"The ABCDE approach is a structured method for the immediate assessment and treatment of a deteriorating or critically ill patient: Airway, Breathing, Circulation, Disability, Exposure. 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