don't do it. why go into a subspeciality which is no longer in demand and the work can be done by any competent new anesthesia grad? Doing hearts is not hard after you have done about 80-100. Of course if you are going into academics and want to devote your life to cardiac anes, then ignore what I said. Do a fellowship in something that other anesthesiologist can't do. Not everyone can do complicated peds. Not everyone can do invasive pain mgmt with implants. No everyone can do regional blocks. Those are 'real' specialities.
What about TEE/complex cardio? Are anesthesia groups really this cavalier about letting "any new grad" do hearts? A quick look at some anesthesiology job sites shows several looking for cardiac anesthesiologists. What about programs which combine critcare and cardiac anesthesia (presumably for a combined career in cardiac intensive care?)?
they let some CA1 and most CA2's do hearts, albeit under some supervision. Yes there are some interesting opportunities with TEE, etc...but most cards position don't requre that.
Don't get me wrong, there is a need for cardiac anesthesiology experts, but you should know that an "average" heart case is easily performed by almost any anesthesiologist/crna. Extra training is not necessary 90% of the time.
But pain and peds standout as complex sub-specialities which not everyone can just jump into.