TAE involves the selective catheterization of a hepatic artery followed by embolic occlusion. Such bubbles are responsible for the most serious of gas embolic symptoms. They are used in clinical medicine to treat embolic or thrombotic stroke. Onyx is an example for a liquid embolic agent. They require more time to react than the liquid embolic agents. Brain ischemia can be further subdivided, by cause, into thrombotic, embolic, and hypoperfusion. Mobility and protrusion of the thrombus are two characteristics associated with increased embolic potential. While effective in preventing many embolic strokes, it also negates endocrine contribution of the LAA. Antibiotic treatment lowers the risk of embolic complications in people with infective endocarditis. They include toxic, metabolic, degenerative diseases, traumatic brain injury, or thrombotic or embolic stroke. A special form of embolic stroke is the embolic stroke of undetermined source (ESUS). However, a recent meta-analysis suggests harm from anticoagulation started early after an embolic stroke. EVOH is used in a liquid embolic system in interventional radiology, e.g. in Onyx. Symptoms of mesenteric ischemia vary and can be acute (especially if embolic), subacute, or chronic. Because the embolic blockage is sudden in onset, symptoms usually are maximal at the start.