It's possible that for experienced researchers, "heart problems" is a more universal category than we're treating it here. AKA a rough analog for "life-threaten

It's possible that for experienced researchers, "heart problems" is a more universal category than we're treating it here. AKA a rough analog for "life-threatening"? I'm under the impression basically all deaths due to senescence (old age) occur from heart failures (potentially in turn caused by other things), so "you're cancer has advanced so far that it now is threatening your heart function" seems like something that might happen frequently. Thus, they're defending the smaller "husbands leave their worryingly sick wives", abandoning whatever previous categorization they have for "serious illness" in the original paper Pure speculation, ofc ;)