Maryland attorneys are spending thousands of dollars to sign up clients who might have had heart stents needlessly implanted by a doctor at St. Joseph Medical Center. The hospital sent letters to hundreds of patients in December, telling them that the expensive stents in their arteries might have been placed there unnecessarily and under false pretenses. The hospital has identified at least 369 people who might have had unwarranted operations, all tied to a single physician, and more could surface as the examination continues, the Baltimore Sun reports.