I know where this phone call is going. I'm on the hospital wards, and a physician in the emergency room downstairs is talking to me about an elderly patient who needs to be admitted to the hospital. The patient is new to me, but the story is familiar: He has several chronic conditions — heart failure, weak kidneys, anemia, Parkinson's and mild dementia — all tentatively held in check by a fistful of medications. He has been falling more frequently, and his appetite has fallen off, too. Now a stroke threatens to topple this house of cards.

The emergency room physician and I talk briefly about what can be done. The stroke has driven the patient's blood pressure through the roof, aggravating his heart failure, which in turn is threatening his fragile kidneys. The stroke is bad enough that, given his disabilities related to his Parkinson's, he will probably never walk again. In elderly patients with a web of medical conditions, the potential complications of any therapy are often large and the benefits small. It's a medical checkmate; all moves end in abdication.

I head to the emergency room. If I'm lucky, the family will accept the news that, in a time when we can separate conjoined twins and reattach severed limbs, people still wear out and die of old age. If I'm lucky, the family will recognize that their loved one's life is nearing its end.