Ms. Li, a 50-year-old woman, has recently been suffering from headache, dizziness, pain, weakness and coldness in her left upper limb, which was not found in many hospitals. According to the patient’s description of her condition, through physical examination and cerebral angiography, our radiologists further clarified the diagnosis for the patient, who was suffering from subclavian artery stenosis, also called “pulselessness”. The blood from the right vertebral artery “backed up” to the left vertebral artery to supply the left upper limb. The blood pressure of the patient’s left upper limb could not be measured, and the pulse beat could not be felt. If surgery was not performed in time, cerebral infarction could result from severe cerebral ischemia, which could even be life-threatening. After a detailed understanding of the patient’s condition, we formulated a comprehensive interventional stenting treatment plan for the patient based on the preoperative cerebral angiography, and performed the interventional stenting treatment under local anesthesia. After the surgery, Ms. Li recovered well, the blood pressure difference of both upper limbs fluctuated within the normal range, the pulse of the left upper limb was restored, the headache and dizziness disappeared, the muscle strength of the left upper limb was normal, and the temperature of the limb was the same as the opposite side, and the patient was discharged from the hospital after only 1 week of hospitalization. Ms. Li suffered from this disease is relatively rare clinically, due to subclavian artery stenosis or occlusion resulting in blood from the heart ejected from the contralateral vertebral artery reflux, the brain’s blood “stolen flow” to the left vertebral artery, supplying the left upper limb, resulting in insufficient blood supply to the brain arteries, which is clinically known as “blood theft syndrome This is clinically known as “blood-stealing syndrome”, which manifests as weakness and fatigue of the affected limb, numbness and soreness, coldness, resting pain, etc., weakening or disappearance of radial artery fluctuations on the affected side, lowering or failure to measure blood pressure of the affected limb, etc., especially when the above symptoms are aggravated after upper limb activities; due to the siphoning phenomenon caused by the distal part of the stenosis, the blood of the contralateral vertebral artery returns to the vertebral artery and subclavian artery on the stenosis side to meet the needs of limb activities, thus Some patients may also experience visual loss or loss of vision, which can lead to cerebral infarction or even life-threatening in severe cases, and surgery must be performed as soon as possible. Interventional stenting is a less invasive and faster recovery treatment for patients, and has become the treatment of choice for subclavian artery steal syndrome.