Management of Acute Stroke with Isolated Facial Asymmetry

Immediate Evaluation and Triage

• The American Heart Association recommends immediate emergency evaluation for patients presenting with isolated facial asymmetry as the sole manifestation of stroke, with urgent brain imaging to confirm diagnosis and determine eligibility for time-sensitive reperfusion therapies 1, 2
• The American College of Emergency Physicians suggests calling 9-1-1 immediately, even if this is the only symptom, as isolated facial droop represents a focal neurological deficit consistent with acute stroke 3
• Patients should be transported directly to a certified stroke center emergency department, not to an outpatient clinic or primary care office, as recommended by the American Stroke Association 4, 3

Emergency Department Evaluation

• The American Academy of Neurology recommends brain imaging be performed urgently (ideally within minutes, certainly within 24 hours) using CT or MRI to differentiate ischemic from hemorrhagic stroke and exclude stroke mimics 5, 6
• Non-contrast CT is typically first-line due to availability, though MRI is more sensitive for small or hyperacute infarcts, according to the American College of Radiology 5, 6
• Key clinical assessments include blood pressure, complete blood count, electrolytes, renal function, coagulation studies, troponin, and ECG, as suggested by the American Heart Association 5, 6

Anatomical Localization and Acute Treatment Decisions

• The American Stroke Association indicates that right facial asymmetry (left facial droop) typically indicates ischemia in the distribution of the right internal carotid artery or right middle cerebral artery 2, 7
• If presenting within 4.5 hours of symptom onset and imaging shows no hemorrhage, the patient should be evaluated for intravenous alteplase (0.9 mg/kg, 10% bolus over 1 minute, remainder over 59 minutes), as recommended by the American Heart Association 8

Risk Stratification and Secondary Prevention

• The American College of Cardiology suggests that if imaging shows no acute infarction, this represents a TIA with extremely high early stroke risk (up to 13% within 90 days, highest in first week) 1, 2
• Carotid duplex ultrasound should be performed urgently in all patients with carotid territory symptoms who are potential candidates for revascularization, as recommended by the Society of Vascular Surgery 5, 6
• If symptomatic carotid stenosis ≥50% is identified, carotid endarterectomy should be performed as soon as possible, ideally within 2 weeks of symptom onset, according to the American Heart Association 9
• Continuous cardiac monitoring should be performed to detect atrial fibrillation, as this fundamentally changes management to anticoagulation rather than antiplatelet therapy, as suggested by the American College of Cardiology 6