In a 69-year-old woman with a history of hypertension who now presents with severe hypertension and acute left eye pain of two hours duration, what are the differential diagnoses?

Differential Diagnoses for Severe Hypertension with Acute Eye Pain

This patient requires immediate ophthalmologic evaluation for acute angle-closure glaucoma and fundoscopic examination for malignant hypertension with hypertensive retinopathy—both are sight-threatening emergencies that demand urgent intervention within hours.

Primary Differential Diagnoses

1. Acute Angle-Closure Glaucoma (Most Urgent Ophthalmic Emergency)

This is the most critical diagnosis to exclude given the acute onset of unilateral eye pain in an elderly woman with severely elevated blood pressure. The combination of:

• Acute unilateral eye pain (2-hour onset)
• Age 69 (increased risk)
• Severe hypertension (184/102 mmHg)

Key features to assess immediately:

• Intraocular pressure measurement (will be markedly elevated >40 mmHg)
• Mid-dilated, non-reactive pupil
• Corneal edema/haziness
• Shallow anterior chamber on slit-lamp
• Severe photophobia
• Nausea/vomiting may accompany

1 identifies acute angle-closure glaucoma as requiring immediate ophthalmology referral when presenting with eye pain, and 2 notes visual disturbances as a key symptom of hypertensive emergencies.

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2. Malignant Hypertension with Hypertensive Retinopathy

The blood pressure of 184/102 mmHg approaches the threshold for hypertensive emergency (≥180/110 mmHg) 2. Eye pain with acute hypertension raises concern for:

Hypertensive retinopathy manifestations:

• Flame hemorrhages, cotton wool spots, papilledema (hallmark of malignant hypertension) 3, 2
• Retinal artery occlusion causing acute vision loss 4
• Hypertensive choroidopathy with serous retinal detachment 5, 6

Critical examination findings needed:

• Fundoscopic examination for bilateral retinopathy (hemorrhages, exudates, papilledema)
• Visual acuity testing
• Blood pressure in both arms
• Neurologic examination for encephalopathy

3 specifies that malignant hypertension commonly presents with BP >200/120 mmHg with advanced bilateral retinopathy, though 7 reports cases with asymmetric presentation at lower pressures.

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3. Giant Cell Arteritis (Temporal Arteritis)

In a 69-year-old woman, this is a critical not-to-miss diagnosis that can cause permanent blindness within 24 hours if untreated.

Key clinical features to elicit:

• New-onset headache (especially temporal)
• Jaw claudication
• Scalp tenderness
• Constitutional symptoms (fever, weight loss, malaise)
• Elevated ESR/CRP (though treatment should not await lab results if clinical suspicion high)

8 emphasizes that high-dose glucocorticoids should be initiated within 24 hours of symptom onset to prevent permanent blindness. The combination of hypertension and eye pain in this age group mandates consideration of this diagnosis 4.

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4. Hypertensive Encephalopathy with Cortical Blindness

Though less likely with unilateral eye pain, BP of 184/102 mmHg can cause:

• Lethargy, seizures, cortical blindness 3
• Headache, visual disturbances 2
• Requires immediate MAP reduction by 20-25% 3

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5. Secondary Causes of Acute Hypertension

Pheochromocytoma should be considered given:

• Acute severe hypertension
• Sudden onset symptoms
• Can cause malignant hypertension with retinal complications 9

Other considerations:

• Medication non-adherence (most common)
• NSAIDs, sympathomimetics, cocaine 3, 2
• Renal artery stenosis (less likely with acute presentation)

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Immediate Diagnostic Workup Required

Within the next hour:

1. Ophthalmologic examination:

   • Intraocular pressure measurement (both eyes)
   • Slit-lamp examination
   • Fundoscopy with dilated pupils
   • Visual acuity testing
   • Pupillary reactions

2. Laboratory tests:

   • Complete blood count (hemoglobin, platelets for thrombotic microangiopathy)
   • Creatinine, electrolytes (acute kidney injury)
   • Urinalysis (proteinuria, hematuria)
   • ESR/CRP (if giant cell arteritis suspected)
   • LDH, haptoglobin (hemolysis) 3

3. Cardiovascular assessment:

   • ECG (acute coronary syndrome)
   • Chest examination (pulmonary edema)

4. Neurologic examination:

   • Mental status, focal deficits (stroke, encephalopathy)

3, 10 emphasize that hypertensive emergencies require immediate diagnostic workup to identify acute target organ damage.

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Critical Management Pitfalls

Do NOT:

• Delay ophthalmology consultation while awaiting lab results if acute angle-closure glaucoma suspected
• Rapidly lower blood pressure without identifying the affected organ system (can worsen ischemia)
• Dismiss unilateral symptoms as "just hypertension" without fundoscopic examination
• Wait for temporal artery biopsy before starting steroids if giant cell arteritis suspected 8

DO:

• Obtain immediate ophthalmology evaluation for any acute eye pain with vision changes 1
• Perform fundoscopy on ALL patients with severe hypertension and visual symptoms 4
• Consider this a hypertensive emergency requiring hospital admission if acute organ damage confirmed 2
• Start high-dose glucocorticoids immediately if giant cell arteritis clinically suspected 8