Diagnosis and Management of Hypertensive Encephalopathy

Clinical Presentation and Diagnostic Criteria

The European Society of Cardiology recommends that hypertensive encephalopathy be diagnosed by the combination of markedly elevated blood pressure with characteristic neurological symptoms, such as headache, altered mental status, visual disturbances, and seizures, that rapidly improve with blood pressure reduction, confirmed by MRI showing reversible posterior white matter edema on T2-weighted or FLAIR sequences 1
Neurological symptoms of hypertensive encephalopathy include somnolence, lethargy, tonic-clonic seizures, cortical blindness, headache, visual disturbances, and altered mental status that may progress to loss of consciousness, as stated by the European Heart Journal 1, 2
The rate of blood pressure increase is more important than the absolute value in hypertensive encephalopathy, with no specific BP threshold, though values commonly exceed 200/120 mmHg, according to the European Heart Journal 1, 2

The European Heart Journal recommends that MRI with FLAIR or T2-weighted sequences be the diagnostic imaging modality of choice for hypertensive encephalopathy, demonstrating increased signal intensity in the posterior white matter regions 1, 2
CT brain is useful to exclude intracranial hemorrhage but is less sensitive than MRI for detecting the characteristic edema pattern, as stated by the European Heart Journal 1, 2

The European Society of Cardiology recommends immediate blood pressure reduction in hypertensive encephalopathy, reducing mean arterial pressure by 20-25% over the first hour using IV labetalol or nicardipine 1, 2, 4
ICU admission with continuous arterial blood pressure monitoring is mandatory for patients with hypertensive encephalopathy, according to Praxis Medical Insights 4
The target blood pressure should be 160/100 mmHg over 2-6 hours if stable, then cautiously normalize over 24-48 hours, as recommended by Praxis Medical Insights 4