I lost my last living grandparent recently in a very similar manner. She had a series of strokes she would never recover from and they essentially had to starve/dehydrate her as she was still breathing. Which was sad.
She was a tough lady, very independent with a sense of humor about aging and life in general. She was on some blood pressure medicine that made her hallucinate (docs said it was a minor side effect ha) and got a real kick out of telling us about the midget she kept seeing on the couch.