Parient care technician question

Hi everyone. I'm currently enrolled in school for the semester, but I wanted to take some time off during the summer to enroll in a CNA program. I do eventually want to take extra training to become a patient care technician so that I can also be able to work in the hospitals in my area (nyc). I find being a pct appealing because you get the opportunity to perform more duties such as blood draws, ekg monitoring, cpr, etc. Do you have to be a cna first in order to become a patient care technician, and do most employers require that you have experience as a nurse's aide before you can work as a pct? Also, are some hospitals willing to train cna's to become pct's? Your advice is appreciated.