BCAA consists of the amino acids leucine, isoleucine and valine. The reason these three amino acids are called BCAA is because they branch off from the other five essential amino acids, (there are a total of eight), to create their own chain. Amino acids are responsible for the formation of proteins in the body.
An aneurysm is an abnormal bulging out or ballooning of a portion of the artery, usually due to weakness of the arterial wall. The aneurysm may enlarge and rupture, often with disastrous consequences.
A fusiform aneurysm is an uncommon aneurysm that causes the artery to bulge all the way around. A dissecting aneurysm is a tear in one of the several linings of an artery. It can leak blood into the other layers and balloon out or block the artery. Some events encourage the development of an aneurysm in the brain.