Stroke is defined as

Stroke is defined as

• A. Slow, progressive memory loss
• B. Sudden interruption of blood flow to the brain leading to cell death
• C. Chronic chest pain
• D. Acute kidney injury

Answer: (B)

Stroke is a sudden loss of blood flow to a part of the brain, which causes brain cells in that area to die from lack of oxygen and nutrients. This abrupt interruption can come from a blocked vessel (ischemic) or a ruptured vessel (hemorrhagic), but the defining feature is the rapid disruption of cerebral circulation leading to tissue injury. The description here matches that idea by stating the blood flow to the brain is suddenly interrupted and cells die as a result. The other options describe different conditions—memory loss typical of dementia, chronic chest pain from angina or heart disease, and acute kidney injury—none of which involve an abrupt disruption of brain blood flow and subsequent brain cell death.

Stroke is a sudden loss of blood flow to a part of the brain, which causes brain cells in that area to die from lack of oxygen and nutrients. This abrupt interruption can come from a blocked vessel (ischemic) or a ruptured vessel (hemorrhagic), but the defining feature is the rapid disruption of cerebral circulation leading to tissue injury. The description here matches that idea by stating the blood flow to the brain is suddenly interrupted and cells die as a result. The other options describe different conditions—memory loss typical of dementia, chronic chest pain from angina or heart disease, and acute kidney injury—none of which involve an abrupt disruption of brain blood flow and subsequent brain cell death.