cantersque:
It IS hard to believe she was in a coma for 73 years, but that is besides the point. Even if she were in a coma for 37 years, (its possible someone misunderstood over here) that was not the point of the story. The point was that her lack of jealousy saved her from decomposing. Don’t pick one detail of the story that sounds exagerated (it may or may not be) to invalidate the story. The idea that a reighteous person does not decompose is not a new one, there are lots of reliable stories with that theme. (if you want verification of this concept, you can probably find it easily enough, though not of this particular story, by asking the Chevra Kadisha in Eetz Yisroel, or authors like Pesach Krohn who reputedly research their stories)
But it takes a gadol of the caliber of R’ Kanievsky to posit a reason why a person merited this zechus.