What is vasospasm? What are the identification and treatment of vasospasm? |
Vasospasm is caused by a strong contraction of the smooth muscle of the vessel wall and a narrow lumen, resulting in a decrease in blood flow. In severe cases, the lumen can be completely occluded. Excessive time can cause blood vessel embolism. It is divided into two types: neurogenic and myogenic. There are many causes of vasospasm. Common symptoms are systemic factors such as excessive mental stress, painful stimulation, hypovolemia, hypotension, inflammation or misuse of vasoconstrictors, and local factors such as cold, mechanical irritation, Surgical stimulation, dryness, extravascular exposure to fresh blood, etc. can induce local vasospasm.
Introduction
Arteriosclerotic plaques of the internal carotid artery or vertebral-basal artery system narrow the vascular lumen and eddy currents. When the eddy current accelerates, the blood vessel wall is stimulated to cause vasospasm and a transient ischemic attack occurs, and the symptoms disappear when the vortex decelerates. However, some scholars believe that due to the special nature of the cerebral vascular structure, it is not easy to occur. However, most scholars believe that vasospasm can undoubtedly occur in the internal carotid artery and the cerebral artery ring, cerebral angiography can be seen in the aortic stenosis; subarachnoid hemorrhage can cause extensive and focal cerebral vasospasm; brain surgery on the brain When the aorta is operated, the diameter of the artery is significantly thinned. Therefore, cerebral arterial spasm can also be caused by persistent hypertension, local injury or microparticle stimulation, and cause transient ischemic attack.