A cath lab refers to cardiac catheterization takes laboratory. These labs have diagnostic imaging equipment that is used to evaluate heart health by allowing health care providers to see the arteries and chambers of a heart. Various people may work in a cath lab, such as a catheterization laboratory nurse, a laboratory technician, and a doctor of cardiology. People in these positions hold various responsibilities in the examination and diagnostic process. Qualifications and skills needed to work in a cath lab vary, ranging from an associate’s degree and certification to a medical doctorate and licensure.