The cardiac catheterization laboratory is a very dynamic work environment. The physical and psychosocial demands of the work environment place a significant amount of stress on the physical well being of the employee. The nature of the work involved includes that of responding to rapidly changing patient clinical conditions which are often urgent, and require repetitive actions in an ergonomically challenging environment. In addition, employees who are directly exposed to the radiation required to perform diagnostic and interventional procedures wear lead aprons weighing on average 10-15 pounds.