What is a transient ischemic attack?

About 1/3 of stroke patients have transient ischemic attacks a few days, weeks, or even months before the onset of the disease. Patients often show sudden weakness in the upper and lower limbs, decreased vision, etc., which usually last for a few seconds, half an hour, or 1-2 hours. It may also occur several times a day, once a few weeks, or once a few months, but it will resolve on its own in less than 24 hours without any sequelae . Transient ischemic attacks often occur suddenly in the awake state without any signs . It is caused by the rapid recovery of blood flow to the brain after a brief interruption of blood supply . Because the condition improves rapidly, patients and their families often ignore it , but it is an important precursor to stroke . Early diagnosis and treatment in the hospital may prevent the occurrence of stroke.