You should check out FREIDA, this gives you all IM-based programs that will allow board certification. Some will not take EM residents others will, just depends.
As for anesthesia-based programs e-mail around some will tell you which ones will and which ones won't. There are others that are EM specific (indiana, BIDMC etc..) these are not necessarily going to get you boarded though. I applied via IM route to all 2 year fellowships.
I had high step scores, no one cared about those it never came up, and most people did not screen based on this, or so I was told. Everyone cares about letters, research (this was mostly a conversation starter) and also what you did in residency to set yourself apart.
As for being behind as an ED resident you will be behind in some things and ahead in others. You don't do a fellowship with nothing to learn. Also managing asymptomatic HTN isn't a frequent issue. Your medicine colleagues know far more about bone marrow transplant patients, the typical course of MDS, frequent complications of unusual diseases etc... I also knew I was going into critical care from the start and spent most of my residency focusing on patients with critical illness.
Also, you should probably ask others on this and other forums about critical care in general. Im sure JDH and others would tell you its not the running around intubating code blues that most EM residents think it is. The pace is slower, there is far more attention to detial, and the daily ins and outs are not what most EM residents percieve. You may already know this but just keep that in mind when deciding to do a fellowship in CC.
