A catheterization laboratory, commonly referred to as a cath lab, is an examination room in a hospital or clinic with diagnostic imaging equipment used to visualize the arteries of the heart and the chambers of the heart and treat any stenosis or abnormality found. In a cath lab, physicians perform minimally invasive tests and procedures to diagnose and treat, for example, cardiovascular diseases. The procedures performed in a cath lab often include small, flexible tubes, called catheters that are used instead of open surgery, to access the heart and blood vessels.