Could Forgetfulness And Confusion After Ligated Inferior Vena Cava Be Serious?

I have a sugically ligated inferior vena cava, I have recently been experiencing some confusion, I am forgetful and often get lost in my hometown. I have noticed these symtoms get worse later in the day. I am concerned about vascular dementia, I have also been diagniosed with reflux in the great veins of my lower extremities. is vascular dementia something I should be worried about?