Chatsworth, CA-based North American Scientificannounced yesterday the appointment of John Rush as president and CEO. The med tech company, which makes radioisotope products for the treatment of cancer, lured Rush from Sanarus Medical of Pleasanton, CA. Rush, 48, had been with Sanarus since 2002. Prior to that, he was president and CEO of Micro Therapeutics (now owned by ev3). He has also done stints at Scimed Life Systems/Boston Scientific and Cilco/CooperVision/Alcon Surgical.