What is a stroke?

A stroke is defined as a medical emergency caused by interrupted blood flow to the brain. This can occur in two primary ways: an ischemic stroke, which results from a blockage in a blood vessel supplying blood to the brain, or a hemorrhagic stroke, where a blood vessel in the brain bursts. Both types lead to a lack of oxygen and nutrients reaching brain cells, which can cause cell death and result in various neurological impairments. Recognizing the symptoms of a stroke and acting quickly is crucial because prompt medical intervention can help minimize brain damage and improve outcomes for the affected individual.

The other options describe symptoms or conditions that are not specific to strokes: a sudden headache may indicate other medical issues, heart rhythm regulation pertains to cardiac problems rather than brain function, and strokes can affect individuals of any age, not just older adults.