Two prominent California hospitals will be allowed to perform cardiac catheterization in outpatient buildings thanks to legislation approved on Friday. Such procedures have been allowed only in main hospital buildings, but supporters say they can now be done safely in new outpatient buildings planned for Cedars-Sinai Medical Center in Los Angeles and Scripps Memorial Hospital in La Jolla. The California Nurses Assn. fiercely opposed the bill, saying there would be fewer safeguards if something goes wrong during a procedure. It also pointed out that outpatient buildings don’t need to meet the same standards for earthquake safety.