I was hired as a new grad (LPN) and through directly onto the tele floor. They put me through a telemetry certification program as well as EKG interpretation. Obviuosly prior to that I had no specific "cardiac experience", thats what you are supposeed to get when you start working.
This sounds a bit fishy to me, perhaps the med/surg staffing wasn't that great and they needed some reason to put you there instead. Why not just ask?!
Perhaps you could ask about being put in the float pool to gather experience from all over...?
Also, keep in mind, you will get experience with cardiac pts. on the med/surg floor, they will most likely just have unlying heart probs but it is a good way to learn how other diagnosis' work with the cardiac issue as a whole...therefore being a great learning experience for you.
Personally though, I liked doing cardiac nursing best, but everyone is different. Good luck