The CSC exam, I feel, was a lot easier than the CCRN. Reason being, if you work in CV/CTICU, you see these types of patients quite frequently. That being said, the CSC solely tests you on your post-op management knowledge. Additionally, there are some things that they ask you about from a medical point of you. So I'd look into things like cardioplegia, anesthetic choices, post-op pain management and VADs (L or Bi). Hope this helps!