Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: In regards to medical history, my mother has been extremely healthy, no smoking or drinking, and no other medical issues. However, it is essential to note that her father and sibling have passed away from a heart attack, and two others have undergone open heart surgery.So, from my understanding, operating on the vertebral artery is extremely dangerous, and for any other stent operations regarding intracranial and extra cranial arteries, the stenosis should be larger than 50%? But what is the likelihood of her ICA percentage growing to 50% and in how long? Considering she suffered from an transient ischemic attack recently reflecting in the MRI, how would you assess this case?. ### Response: The number of 50% is an example of what we would use in my local practice - it does not necessarily represent the targets in your area/situation. That is a much more nuanced question that can only be answered by your team..