The long accent in A is written in the middle between the staves, so it is unknown to which hand it should be assigned. A comparison with analogous bar 283 proves that Chopin most probably meant accenting the R.H. In GE it was assigned to the L.H. (as a short accent) and in FE (→EE) it was overlooked.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Long accents, Errors in FE, Inaccuracies in GE
notation: Articulation, Accents, Hairpins