Why do you state that you will not be "justified for the certificate?" The only requirement listed in the CCRN/PCCN Exam Handbook
is the requirement for:
Practice as an RN or APRN is required for 1,750 hours in direct bedside care of acutely and/or critically ill patients during the previous 2 years, with 875 of those hours accrued in the most recent year preceding application. Eligible hours are those spent caring for the patient population (adult, pediatric or neonatal) of the exam for which you are applying.
The AACN no longer lists skills or experiences, outside of the required bedside hours, for eligibility.
However, if you don't believe that your patient population fits this requirement, The PCCN specialty certification "was introduced in 2004 for progressive care nurses providing care to acutely ill adult patients" might be a better fit. The CCRN/PCCN Exam Handbook
describes the PCCN practice requirement as:
Practice as an RN or APRN is required for 1,750 hours in direct bedside care of acutely ill adult patients during the previous 2 years, with 875 of those hours accrued in the most recent year preceding application.
Both the CMC and CSC certifications are very specific to cardiac medicine or surgery. You might qualify for the CMC, but it is doubtful from your practice description that you would meet the practice requirements for the CSC. If you have not yet done so, you might review the CMC/SCS Exam Handbook