If not enough oxygen gets to your brain, a condition known as hypoxia can occur. Hypoxia can lead to various symptoms and complications, depending on the severity and duration of the oxygen deprivation. Some of the immediate effects include confusion, shortness of breath, and rapid heart rate. Prolonged or severe hypoxia can lead to loss of consciousness, seizures, brain damage, and even death. The brain is particularly sensitive to oxygen deprivation, and cells can begin to die within minutes without an adequate supply of oxygen. read more >>

Ischemic stroke happens when part of the brain is injured because it isn't getting enough blood. The brain needs a constant supply of blood, which carries oxygen and other nutrients. The brain cannot survive for long without the oxygen carried by the blood.read more >>