I am a medical doctor, and something could have and perhaps should have been done sooner. It sounds like she was having a "stroke in evolution." A clot-busting drug or catheter intervention might have helped her if done within a few hours after her symptoms started. FULL DISCLOSURE: Your sister was not my patient, and this comment should not be interpreted as medical advice. Nor have I reviewed her records With that said, you might want to seek out other medical and legal advice. I am so sorry for you and your sister. I hate when something adverse happens in medicine that was potentially preventable or treatable.