For me the two most troubling actions of her husband were a) to refuse to allow the medical folks to administer a swallow test and b) to refuse to allow her to receive the sacraments. Pete Vere wrote a good article about this two years ago. Pete is a canon lawyer and his article touches only on her canonical rights, without addressing the larger issue of the denial of her civil right to practice her religion. It's well worth reading.
Why Was Terri Denied Holy Communion?