chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and basesacids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Properties. .....
Mission. Established in 1984, National Stroke Association (NSA) has grown to be the leading resource for stroke. NSA is the only national non-profit organization in the United States devoting 100 percent of its resources to stroke through a variety of innovative and high impact programs. We provide education, services and community-based activities in prevention, treatment, rehabilitation and recovery.
Causes Causes of stroke. A stroke happens when the blood supply to your brain is cut off. This can be caused by a blood clot in an artery in your brain (ischaemic stroke) or the blood vessel bursting (haemorrhagic stroke).Other things that can increase your risk of having a stroke include: 1  smoking. 2  high blood pressure.3  high cholesterol. stroke happens when the blood supply to your brain is cut off. This can be caused by a blood clot in an artery in your brain (ischaemic stroke) or the blood vessel bursting (haemorrhagic stroke). Other things that can increase your risk of having a stroke include: 1  smoking. 2  high blood pressure. 3  high cholesterol.