Which statement about stroke is true?

• A. It occurs when a blood vessel supplying the brain becomes blocked, causing hypoxia and brain tissue death.
• B. It only occurs if a blood vessel ruptures and bleeds inside the brain.
• C. It is a result of a problem with the heart rather than brain vessels.
• D. It never leads to brain damage.

Answer: (A)

Strokes happen when the blood supply to part of the brain is interrupted, so the brain tissue is deprived of oxygen and nutrients and brain cells start to die. The statement that is true describes this exact mechanism: a brain-supplying vessel becomes blocked, leading to hypoxia and brain tissue death. This corresponds to the ischemic type of stroke, which is the most common. It’s important to recognize there is another form where a brain vessel ruptures and bleeds, which is hemorrhagic stroke, but the blocking mechanism in the true statement correctly captures a primary cause of many strokes. Either way, stroke can cause serious brain damage, underscoring why rapid recognition and emergency care are crucial. In a dental setting, if stroke signs appear, stop the procedure, call emergency services, and monitor the patient while awaiting help.