Juridian Soul
Would someone with a heart condition be ALLOWED to stand to Impress?
I am in no way staff or anything, but my inclination would be "no, not if it was known." Because riders have a pretty physically demanding job and at this point in the metaplot, all the Weyrs know the Red Star's creeping closer/Threadfall is somewhat nigh, I don't think anyone would want to put someone with a heart condition (I'm guessing would eventually be fatal?) on a dragon ^^; I would guess if they are unaware, then...well, they're unaware of it, but once it was discovered I doubt they'd be able to fly in the fighting wings?
Granted, I don't know very much about heart conditions, so all that's just my first reaction ^^