Immediate Emergency Management of Acute Stroke with Unilateral Numbness

Critical First Steps

The American Heart Association recommends activating emergency medical services immediately and transporting the patient to the nearest stroke center by ambulance 1
The patient should be evaluated by a physician with 12-lead ECG and biomarker determination, rather than solely over the telephone 1

Checking bilateral radial pulses and measuring blood pressure in both arms immediately can help differentiate between stroke and acute arterial occlusion, with a blood pressure difference >20 mmHg between arms confirming significant arterial compromise 2, 3
Assessing the "6 P's" of acute limb ischemia (Pain, Pallor, Pulselessness, Paresthesias, Poikilothermia, and Paralysis) can help identify acute arterial occlusion requiring emergent thrombectomy/embolectomy 2, 3
Performing the Cincinnati Prehospital Stroke Scale assessment (facial droop, arm drift, and abnormal speech) can help identify stroke, with a combination of left arm numbness and facial weakness or speech disturbance having a 72% probability of stroke 2, 3

Brain MRI with diffusion-weighted imaging should be performed immediately as the preferred initial imaging modality to detect acute ischemic changes and differentiate ischemic from hemorrhagic stroke 2, 3
If MRI is unavailable, CT head without contrast should be performed to rule out hemorrhage 2, 3
CT angiography or MR angiography from aortic arch to vertex should be obtained to evaluate carotid and vertebral artery disease 2

Dual antiplatelet therapy (aspirin + clopidogrel 75 mg) should be initiated for the first 21 days in patients with symptomatic carotid stenosis not undergoing revascularization, followed by long-term single antiplatelet therapy 2, 3
Carotid ultrasound should be performed to identify extracranial carotid stenosis >70% requiring carotid endarterectomy 2, 3
Patients presenting within 48 hours with unilateral numbness require same-day comprehensive clinical evaluation by a healthcare professional with stroke expertise within 24 hours of first contact 2
Immediate vascular surgery consultation for thrombectomy/embolectomy is required for acute arterial occlusion, as outcome depends entirely on time to reperfusion 2, 3

The American Heart Association/American Stroke Association guidelines recommend not withholding anticoagulation if intracranial hemorrhage is ruled out, as patients with cerebral venous thrombosis should be continued on anticoagulation even after hemorrhagic transformation 4

The American College of Radiology recommends CT angiography (CTA) of the head and neck to confirm vessel occlusion and assess collateral circulation in patients with suspected large vessel occlusion 5
The hyperdense vessel sign on non-contrast CT has high specificity for acute arterial occlusion and should prompt further vascular imaging, according to the American Heart Association 6
CTA is rated as "usually appropriate" (rating 8/9) for new focal neurologic deficits and can be performed immediately following non-contrast CT, as stated by the American College of Radiology 5

The American College of Emergency Physicians recommends maintaining systolic blood pressure ≥100 mmHg to preserve cerebral perfusion pressure in patients with acute stroke 7
Avoiding hypotension (SBP <90 mmHg) is crucial, as it is associated with unfavorable neurological outcomes, according to the American Heart Association 7

Endovascular thrombectomy is the standard of care for large vessel occlusions when patients present within the therapeutic window, as recommended by the American Heart Association 5
Catheter angiography may be appropriate (rating 5/9) for definitive diagnosis and treatment in acute stroke with fixed or worsening deficits, according to the American College of Radiology 5