Cardiac Monitoring Services provides free heart monitoring services to doctors and medical facilities located in Irvine, California. They use Holter devices and event monitors to alert medical professionals and patients of any unusual heart rate or EKG activity patterns. An EKG measures the electrical activity of the heart through waves on paper and can help doctors identify potential heart problems, determine if chest pains are from a heart attack or angina, and investigate heart disease symptoms like dizziness and shortness of breath.