Cerebrovascular Accident

What Is Cerebrovascular Accident?

A cerebrovascular accident (CVA), commonly called a stroke, occurs when blood flow to part of the brain is disrupted, depriving brain tissue of oxygen and causing cell death within minutes. Ischemic strokes, caused by a clot blocking a cerebral artery, account for roughly 87% of strokes, while hemorrhagic strokes, caused by a ruptured blood vessel bleeding into or around the brain, are less common but often more severe. EMS providers use rapid stroke screening tools like the Cincinnati Prehospital Stroke Scale (facial droop, arm drift, slurred speech) or FAST (Face, Arms, Speech, Time) to quickly identify a likely stroke and note the critical detail of last known well time, since that determines whether the patient is a candidate for clot-busting medication (tPA) or mechanical thrombectomy at the hospital.

Why Cerebrovascular Accident Matters on the Fireground

Stroke treatment is extremely time-sensitive — the phrase "time is brain" reflects that an estimated 1.9 million neurons die every minute a large-vessel stroke goes untreated. EMS providers play a critical role by recognizing stroke symptoms quickly, establishing the last known well time, and transporting to an appropriate stroke-capable facility (or activating a stroke alert ahead of arrival), all of which directly affects whether a patient qualifies for time-limited treatments that can dramatically reduce long-term disability.

Relevant NFPA Standards

• AHA/ASA Guidelines: Guidelines for the Early Management of Patients With Acute Ischemic Stroke
• NFPA 455: Standard for Emergency Medical Services (EMS)

Field Procedures & Tactical Steps

1. Perform a rapid stroke screen using a standardized tool such as the Cincinnati Prehospital Stroke Scale or FAST assessment.
2. Determine and document the last known well time by asking the patient or bystanders precisely when symptoms began or when the patient was last seen normal.
3. Check blood glucose to rule out hypoglycemia as a stroke mimic.
4. Transport promptly to the nearest appropriate stroke-capable facility and notify the receiving hospital early to activate a stroke alert.
5. Monitor airway, breathing, and vital signs closely en route, positioning the patient to protect the airway if swallowing or consciousness is impaired.

Common Context & Application

Suspected on calls involving sudden facial drooping, one-sided weakness or numbness, slurred or garbled speech, sudden vision changes, severe headache, or acute confusion — assessed quickly using a standardized stroke screening tool to guide transport destination and hospital notification.

Frequently Asked Questions about Cerebrovascular Accident