A 82-year-old female presented with history of loss of vision in right eye for about 15 minutes and it cleared up. She has a history of diabetes and hypertension. She had which showed old infarct on right side. Carotid duplex showed that patient had 99% carotid artery stenosis. Which one of the following statements is TRUE?
Neurological events are associated with extracranial carotid artery in about 60%. Forty percent may have extracranial/intracranial cause for neurological events, which includes cardiac emboli, arch of aorta as source of emboli; intracranial bleed may be more than just a TIA. It is not always that platelet emboli are the cause of TIA, it could be due to atheroma. It is not always attributed to thrombus.
60%chance that extra cranial carotid artery stenosis is the cause of transient ischemic attack (TIA)
It is always due to platelet emboli.
25% may be intracranial bleed.
0.5 to 10% may have cardiac and other causes of TIA.
Arterial Disorders