My mother went up to the hospital again last night, with stomach-flu-like symptoms (nausea, the runs, etc.), and was admitted for the night to watch over her. Which in itself doesn't sound too bad, but apparently they found through tests that she'd had a heart attack at some point, either here at home or after she got up there. And now they just called (at 6am) to say that her blood pressure's low, her breathing's irregular, etc.
So if you have any spare good thoughts to send our way, please do.