Amanda Tang of Northridge, Christina Tostado of San Diego and Marisa Krystian of Santa Barbara watch as Susan Johnson and Neil Carlson of USC University Hospital show how cardiac surgeons use one piece of the total $4 million worth of equipment in the hospital's cardiac catheterization lab. 

(Photo from left to right:  Amanda Tang, Christina Tostado, Marisa Krystian, Susan Johnson, Neil Carlson) Lisa M. Brook/Brook Photography