Interested in Pediatric Cardiothoracic Anesthesiology

Third year DO student here that's intrigued by anesthesiology. I have always wanted to do cardiology, but I think I would be much happier in anesthesia. I still will do rotations in both next year just to make sure, but I've been trying to do some research and was just curious if someone knows of programs that offer pediatric cardiothoracic fellowships. Or, would you have to do a fellowship in each category? Either way, how competitive are these programs? Another thing that I've seen lately...

Interested in Pediatric Cardiothoracic Anesthesiology

Interested in Pediatric Cardiothoracic Anesthesiology