That's a symptom effectively, AV block is just ascribing a name to that description, it's not a disease or injury itself, though yes there may be some underlyin

That's a symptom effectively, AV block is just ascribing a name to that description, it's not a disease or injury itself, though yes there may be some underlying cause of it. It's not like they accidentally started permitting it, because if the rule was 'now pilots with first degree AV block are good to go' is the same thing as saying 'now pilots with PR interval >0.2s ...'. Presumably they determined it's not a significant indicator of anything sufficiently bad or imminent in the 0.2-0.3 range.