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Severe Hypertension: Evaluation and Treatment

Robert L. Gauer, MD
Adam I. Rifaat, MD
Daniel R. Blankinship, DO

American Family Physician. 2026;113(5):459-468.

Author disclosure: No relevant financial relationships.

This clinical content conforms to AAFP criteria for CME.

Hypertension affects approximately 46% to 48% of US adults, with severe blood pressure elevations (180/110–120 mm Hg or higher) observed in more than 13% of individuals with preexisting hypertension. In the absence of new or worsening target organ damage, this is defined as severe hypertension. Although guidelines provide structured approaches to chronic hypertension management, guidelines for management of acute severe hypertension are limited. In the outpatient setting, medication nonadherence is the most common cause of severe hypertension. This typically requires reinitiating or increasing the dosage of antihypertensive therapy. Out-of-office blood pressure monitoring is recommended, and barriers to adherence should be investigated. In hospitalized patients, transient blood pressure elevations are often triggered by secondary factors such as anxiety, hypervolemia, pain, or withdrawal of home medications. Randomized and observational trials have shown that inpatient treatment of severe hypertension does not improve short-term outcomes but increases the risk of cardiovascular events and acute kidney injury and the length of hospitalization. Use of short-acting or intravenous antihypertensive medications is associated with adverse outcomes and is not recommended. Evaluation for secondary hypertension is recommended in cases of resistant hypertension, progressive blood pressure elevation, age of onset younger than 30 years, or evidence of premature target organ damage.

Hypertension affects approximately 46% to 48% of US adults and up to 75% of those older than 65 years.1,2 Uncontrolled hypertension represents a growing public health challenge, as it disproportionately affects ethnic minorities, individuals with obesity, and those with lower socioeconomic status.3–5 Acute severe blood pressure (BP) elevations in the absence of target organ damage are not associated with adverse short-term outcomes.3,6–8 Multiple medical specialty organizations provide evidence-based guidelines for hypertension management; however, recommendations for management of severely elevated BP in the ambulatory and inpatient settings are limited.6,9–13

WHAT’S NEW ON THIS TOPIC

Severe Hypertension
In a large, retrospective cohort study, 13.1% of adults with preexisting hypertension had blood pressure measurements of 180/120 mm Hg or greater. These elevated measurements were observed across multiple clinical settings, including inpatient hospitalizations (31%), emergency department encounters (26%), and outpatient clinic visits (43%).
A retrospective cohort study of hospitalized patients with severe hypertension who did not receive antihypertensive therapy found that blood pressure spontaneously decreased to less than 140/90 mm Hg in 44% within 3 hours.
Multiple trials have shown no short-term benefit of inpatient treatment of severe hypertension. Treatment has been associated with increased risk of cardiovascular events, acute kidney injury, longer hospital stay, and mortality.

SORT: KEY RECOMMENDATIONS FOR PRACTICE

Clinical recommendation Evidence rating Comments
Out-of-office blood pressure measurement is recommended for patients with severe hypertension to evaluate for white coat hypertension, masked hypertension, and response to antihypertensive medication.12,20 C Clinical practice guidelines
Diagnostic evaluation for asymptomatic severe hypertension is not indicated unless there is concern for new or worsening target organ damage or secondary hypertension.31,32 C Clinical policy, expert opinion
Treating asymptomatic severe hypertension in inpatients has shown no benefit. Treatment has been associated with increased risk of acute kidney injury, stroke, myocardial infarction, hypotension, hospital readmission, longer hospital stay, and mortality. Gradual blood pressure reduction over several days to weeks is recommended.6,9,12,17,34 B Multiple prospective and retrospective cohort studies in various clinical settings, clinical practice guidelines
Patients with severe blood pressure elevation without symptoms of target organ damage should not be referred to the emergency department. No improved clinical outcomes have been shown for patients referred to the hospital vs discharged from the office setting.8,12 C Retrospective cohort study, clinical practice guidelines, expert opinion

A = consistent, good-quality patient-oriented evidence; B = inconsistent or limited-quality patient-oriented evidence; C = consensus, disease-oriented evidence, usual practice, expert opinion, or case series. For information about the SORT evidence rating system, go to https://www.aafp.org/afpsort.

ROBERT L. GAUER, MD, is a hospitalist in the Department of Internal Medicine at Womack Army Medical Center, Fort Bragg, North Carolina.

ADAM I. RIFAAT, MD, is a hospitalist in the Department of Family Medicine at Eisenhower Army Medical Center, Fort Gordon, Georgia.

DANIEL R. BLANKINSHIP, DO, is a resident in the Department of Internal Medicine at Womack Army Medical Center, Fort Bragg.

Address correspondence to Robert L. Gauer, MD, at robertgauer@yahoo.com.

Author disclosure: No relevant financial relationships.

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