Brain embolism is a form of cerebral infarction, so essentially, it is also a type of cerebral infarction. Cerebral infarction encompasses a wider range, including cerebral thrombosis, lacunar infarction, watershed infarction, and others. Brain embolism primarily refers to abnormal substances entering the bloodstream, which then enter the arteries of the brain, causing obstruction in these arteries and leading to ischemia and hypoxia of the brain tissue, thus presenting clinical symptoms of cerebral infarction. The onset of the condition in patients is quite severe, rapidly leading to paralysis of limbs and disorders of speech function. In cases of extensive brain embolism, patients may even experience coma and death as serious complications. Most patients with brain embolism have a history of atrial fibrillation. Atrial fibrillation can lead to the formation of mural thrombi, and when these thrombi dislodge, they can cause brain embolism.