1.   We were told that his stroke was caused by a clot in his brain.

2.   Atherosclerosis causes strokes when pieces of fatty deposits lining the neck artery break off and lodge in the brain.

3.   A bacteria colony in the brain can destroy tissue or clog a blood vessel, causing a stroke.

4.   A major risk of both types of implanted pump is the formation of blood clots, which can cause strokes by blocking blood flow to the brain.

5.   But doctors have hesitated to give aspirin quickly because it thins the blood and can harm patients whose strokes are caused by brain hemorrhages.

6.   Doctors told government officials that if the blockage in the main artery on the right side of his neck was not removed, it could have caused a stroke.

7.   He was admitted to the neurological intensive care unit and given a blood thinner that breaks up the kinds of blockages that often form to cause strokes.

8.   If a piece of a clot breaks off and travels to an artery that feeds the brain, the blockage of blood flow likely will cause a stroke.

9.   If a clot were to move to an artery of the brain, it could cause a stroke.

10.   If they go to the brain, they can cause a stroke.