Fake heart attacks

[Staley]

The answer does not fit the "one-letter" description at all.

[Paucle]

Thanks for trying it, Staley! Funny, when I read the question that's what struck me immediately and my fingers flew to my KB but then jammed on the brakes when I realized my answer wasn't a one-L.

[Charlene]

Technically, there are two letters and because they are the same two letters in the same two positions, I thought why not?

[Staley]

It's all four letters, though.