Hi,
Your question is a good one. There are so many courses out there that offer comprehensive critical nursing skill training, but would it be worthwhile for you to take such a course. You say that you already have an intensive care certification so another certification wouldn't likely be your goal. No training is wasted even for review, but I understand your point of wanting something specific to cardiac care. What you're describing is a program generally taught by facility nurse educators for telemetry nurses. Look into it and think about signing up for the next class offered. You may also consider spending a few days in the cardiology department interpreting ECGs, observing treadmill tests, echos, pacemakers, catheterizations and so on. Those people are a tremendous resource and usually love to teach. It would be total immersion but I'm sure you would come away with a better sense of understanding. Good luck.
R