My Mother Was Dianoseed With Severe Leaky Valve. She Is

My mother was dianoseed with severe leaky valve. She is 81 years old and has been complaining for some months about having shortness or breath. I am concerned, she is going to have a sonogram with a camera down her throught. Is she going to be ok what is the life expentency with someone with this condition and are there non invasive treatments?