Home > Heart Disease > Intro to the Cath Lab Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Mar 03, 2008 by Deanostent, Views: 4610 This video is an introduction to the cardiac catheterization lab. Cardiac cath is performed in patients who are suspected of having coronary artery disease, or blockage in the heart, as well as people with valvular heart disease. This allows doctors to look at the heart vessels using xray dye. Video courtesy of eMedTV.com