What is the appropriate management for a patient with an acute cerebrovascular accident (stroke) due to a parieto‑occipital infarct presenting with hemiplegia after six hours?

Management of Acute Parieto-Occipital Infarct with Hemiplegia at 6 Hours

At 6 hours from symptom onset, this patient is beyond the standard IV thrombolysis window (4.5 hours) but remains within the potential window for mechanical thrombectomy if a large vessel occlusion (LVO) is present and advanced imaging demonstrates salvageable tissue. 1

Immediate Emergency Management

Airway, Breathing, and Circulation

• Maintain oxygen saturation ≥94% with supplemental oxygen 1
• Intubate only if airway is compromised or ventilation is insufficient due to impaired alertness 1
• Correct hypotension and hypovolemia to maintain adequate systemic perfusion 1

Critical Initial Assessments (Do NOT Delay Imaging)

• Check capillary blood glucose immediately - treat hypoglycemia (<60 mg/dL or 3.3 mmol/L) with IV dextrose 1
• Obtain ECG, complete blood count, electrolytes, creatinine, INR/PTT, troponin - but do not delay imaging or treatment 1
• Assess stroke severity using NIHSS score 1

Blood Pressure Management

Do NOT treat hypertension acutely unless:

• BP >185/110 mmHg AND patient is being considered for thrombolysis 1
• Concomitant acute MI, aortic dissection, or preeclampsia/eclampsia 1

Otherwise, allow permissive hypertension to maintain cerebral perfusion.

Imaging Protocol

Obtain brain imaging immediately - this is the critical decision point 1:

1. Non-contrast CT head (or brain MRI) to exclude hemorrhage
2. CT angiography (CTA) from arch to vertex to identify LVO 1
3. CT perfusion (CTP) or MRI with diffusion-weighted imaging (DWI)/perfusion-weighted imaging (PWI) to assess core infarct size and penumbra 1

Reperfusion Decision Algorithm at 6 Hours

If Large Vessel Occlusion is Present (ICA or M1 MCA):

Mechanical thrombectomy is indicated if ALL criteria are met 1, 2:

• Age ≥18 years
• Pre-stroke mRS score 0-1 (functionally independent)
• NIHSS score ≥6
• ASPECTS ≥6 on imaging
• Causative occlusion of internal carotid artery or MCA (M1)
• Groin puncture can be initiated within 6 hours of symptom onset

Extended window (6-24 hours) thrombectomy is recommended if 1:

• Advanced imaging (CTP or DWI-MRI) shows sizable mismatch between ischemic core and area of hypoperfusion/clinical deficit
• This applies to anterior circulation LVOs

If No LVO or Outside Thrombectomy Criteria:

IV alteplase is NOT recommended at 6 hours from symptom onset 3 - the standard window is 4.5 hours.

Exception: If the patient has unclear time of onset or wake-up stroke, IV alteplase may be considered if MRI shows DWI-FLAIR mismatch and treatment can be initiated within 4.5 hours of symptom recognition 1

Acute Medical Management (All Patients)

Antiplatelet Therapy

Start aspirin 160-325 mg within 24-48 hours 3, 4, 5:

• Do NOT give aspirin within 24 hours if thrombolysis was administered 4, 5
• Aspirin reduces early recurrent stroke risk
• Can be given rectally or via nasogastric tube if unable to swallow

DVT Prophylaxis

For patients with restricted mobility 3:

• Prophylactic-dose subcutaneous LMWH (preferred) or unfractionated heparin starting between days 2-4 3
• OR intermittent pneumatic compression devices 3

Supportive Care

• Treat fever >37.5°C with antipyretics 6
• Treat hyperglycemia >155 mg/dL 6
• Monitor for neurological deterioration
• Watch for malignant cerebral edema (may require decompressive hemicraniectomy) 6

Stroke Unit Admission

All acute stroke patients should be admitted to a stroke unit 1 - this alone improves mortality and functional outcomes through:

• Continuous neurological monitoring
• Early mobilization protocols
• Swallow assessment before oral intake
• Early rehabilitation initiation

Common Pitfalls to Avoid

1. Do not delay imaging to obtain laboratory results - only glucose must precede alteplase if given 1
2. Do not assume the patient is "too late" for treatment at 6 hours - advanced imaging may identify candidates for extended-window thrombectomy 1
3. Do not aggressively lower blood pressure unless specific indications exist - permissive hypertension maintains collateral flow 1
4. Do not give aspirin if thrombolysis was administered - wait 24 hours 4, 5
5. Do not skip CTA - identifying an LVO is critical for thrombectomy candidacy 1

Key Point for This Case

The critical determinant at 6 hours is whether advanced imaging demonstrates salvageable tissue with a large vessel occlusion. If present, mechanical thrombectomy offers substantial benefit even at this time point. If no LVO or no salvageable tissue, focus shifts to aspirin therapy, supportive care, stroke unit management, and early rehabilitation 1, 2.