Atherosclerotic stenosis of intracranial blood vessels is the main cause of cerebral infarction in our country, and usually occurs in patients with risk factors such as hypertension, or hyperlipidemia, or diabetes mellitus, and smoking. In some patients, cerebral infarction is preceded by a transient ischemic attack (TIA). This kind of patients with intracranial atherosclerotic stenosis of cerebral infarction, through the effective control of the above risk factors, antithrombotic drug prevention, but there are still a lot of cases of reoccurrence of cerebral infarction, and often reoccurrence of the symptoms are more serious than the previous one. So addressing intracranial vascular stenosis is often a last resort. However, atherosclerotic stenosis of intracranial vessels is the “Mount Everest” of our vascular interventional therapy, because the appearance of intracranial blood vessels is completely different from peripheral blood vessels, and its thickness is only 1/10 of the thickness of small blood vessels in the heart or limbs; intracranial blood vessels lack the external elastic layer and the middle muscle layer, which is more brittle than peripheral blood vessels; intracranial blood vessels and blood vessels are mostly suspended on the surface of the brain, and after external pulling, they are more fragile than peripheral vessels; intracranial vessels and blood vessels are often suspended on the surface of the brain. Brain surface, some small blood vessels issued from the trunk after external pulling have the possibility of being pulled off; the biggest difficulty is that intracranial blood vessels are curved, and it is difficult to reach the treatment site with interventional devices such as guide wires and stents; in addition, intracranial blood vessels are very small, and the blood vessels to be treated are usually around 2.5~3.5mm. In view of the above reasons, the treatment of cerebral vascular stenosis is quite difficult and equally risky. Neurology Ward 13, under the leadership of Dr. Chou, has recently treated more than a dozen cases of atherosclerotic stenosis of intracranial vessels. In the last two weeks, we have treated two very difficult cases of intracranial stenosis, as follows. Case 1: The patient was a 42-year-old male with recurrent left-sided limb weakness for 3 months, accompanied by dizziness. The patient had hypertension and smoked for many years. Since December 2010, he had recurrent episodes of left-sided limb weakness, with each episode lasting more than 10 minutes, and the symptoms could be completely relieved. However, the episodes became more and more frequent, so that the episodes occurred with a little forceful activity. She had been to the local provincial hospital and some municipal hospitals for treatment, and no abnormality was found in the cranial magnetic resonance, and the seizures could not be terminated by taking medicine and hanging up water. on March 9, she came to the Department of Neurology of Eagle’s Nest Hospital, and was diagnosed with “transient ischemic attack”, which is commonly known as “mini-stroke”, based on the characteristics of the onset of the patient. The patient was diagnosed with “transient ischemic attack”, commonly known as “mini-stroke”. Transient ischemic attacks such as this one, which occur frequently with similar symptoms each time, are a feature of atherosclerotic stenosis of intracranial blood vessels. After the group discussion, it was decided to perform cerebral angiography, which revealed significant stenosis of the right middle cerebral artery, with a stenosis rate of 95%. 1. Before treatment, the right middle cerebral artery was severely stenotic. During the treatment, a 0.014 microguidewire was carefully passed through the stenotic lesion under the road map, and a small balloon was used to pre-expand the stent, which was convenient for the stent to pass through. The stent was then released after accurate positioning along the guidewire. The stent was fully expanded on follow-up imaging, the stenosis was completely improved, and the blood supply to the distant vessels was improved. 2. After treatment, the stenosis of the right middle cerebral artery completely disappeared. At the time of treatment, the patient told us on the operating table that his mind was immediately refreshed. Before the treatment, there was always a feeling of a heavy weight pressing on his head, and he was drowsy. This feeling resolved immediately after the treatment. He has not had another attack since the treatment.