The sac on the outside of the lungs filled with air, put too much pressure on her heart, causing her
heart to go into
heart attack
and she died, for a short time. While they worked on her to bring her back, she suffered a massive stroke that took all long term memory away from her. So for the last several years, even though she is alive, she isn't the person she was when she went into the hospital, and she never will be.
I've been told that is why Doctors call it a practice.