无沦何时一个区域的脑血流下降到足以损害神经元的功能时,就会出现局部缺血的症状。由于局部神经功能障碍是可逆的,伴发的临床症状是暂时的,因此叫做暂时性缺血发作(TIA)。TIA 的局部脑功能紊乱持续不超过24小时。事实上,大多数 TIA 是短暂的,在几分钟到几小时之内。通常 TIA 的原因可分为三种病理生理类型:①血管异常,包括心脏和颅 No symptoms of ischemia occur when the blood flow in an area is reduced enough to impair neuronal function. Because local neurological dysfunction is reversible and the clinical symptoms associated with it are transient, it is called transient ischemic attack (TIA). TIA local brain disorders continued for no more than 24 hours. In fact, most TIA is short, in minutes to hours. The causes of TIA can be divided into three types of pathophysiology: ① vascular abnormalities, including the heart and cranial