Oh! I LOVE Italy! What a great place! I'll give you several schools in the Southern California area. There are a whole lot of schools for CRNA here. Each have different requirements. Not vastly different, but the fine details are different.
First, all nurse anesthetist candidates must have a valid registered nurse license from one of the 50 states. They must have worked in critical care for (most programs 1-2 years). You must hold a BSN or BA.
See each website for additional details. You may also feel free to send questions to me personally. If I can answer, I will or direct you to where you can look for the answer.
Good Luck!
http://www.kpsan.org/ Kaiser Permenente Schhol of Anesthesia
http://www.aana.com/ American Association of Nurse Anesthetists website
http://anesthesia.med.sc.edu/apply.htm USC School of Anesthesia
http://www.txwes.edu/nurseanesthesia/index.htm Texas
There are so many more. Try these and let us know if you have more questions!