Nationwide data show that although only about 12 percent of X-ray exams are for interventional cardiology or electrophysiology (EP) procedures, nearly 50 percent of a patient’s lifetime radiation exposure comes from the cardiovascular labs. In an effort to reduce this level of patient radiation exposure, Scripps Prebys Cardiovascular Institute, part of Scripps Memorial Hospital and Scripps Green Hospital, evaluated Biosense Webster’s CartoUnivu module for the Carto 3 System (Figure 1) before it was made commercially available earlier this year. They looked for its potential benefits in reducing radiation exposure to patients and clinical staff.