My 93 yr aunt has mesenteric ischemia, 2 of her valves are 100% closed, the 3rd 50%. how long till it closes all the way? been to er twice this week.

No way to predict: I think you mean that 2 of the three blood vessels supplying the gut are closed. If the last vessel, presumably the superior mesenteric or celiac has a 50% blockage, she could benefit from angioplasty and stenting of the vessel, since she is very symptomatic. Difficult problem this, considering her age, and a candid discussion with her doctors may help you get a better handle on options/prognosis.

Not very long: Unpredictable. However it long time survival is not likely due to age and extensive disease.