* know your cardiac rhythms and treatments for each
* you will be administering a wide variety of medications, but look up your cardiac meds and gtts. Not all PCUs are equal, but common gtts on my floor include dopamine, cardizem, lasix, heparin & NTG.
* As I mentioned, not all PCUs are created equal...but here is a list of diagnoses that are common to my unit: chest pain, heart failure, pneumonia, COPD exacerbation, acute respiratory failure, PE, DVT, patients prepping for heart cath/stress test, post-cath patients (including pulling sheaths), acute/chronic renal failure/ESRD, electrolyte imbalances (most notably hyper/hyponatremia and hyper/hypokalemia), ETOH intoxication, overdoses, acute CVA/TIA, seizures, A-fib with RVR, syncope, bradycardia, SIRS/sepsis. I would brush up on the pathophysiology and nursing interventions/etc for the diagnoses mentioned above.