What Do Cardiovascular Technologists and Technicians Do? Cardiovascular technologists and technicians assist physicians in diagnosing and treating cardiac (heart) and peripheral vascular (blood vessel) ailments. They may specialize in any of three areas of practice: invasive cardiology, echocardiography, and vascular technology. Cardiovascular technologists who specialize in invasive procedures are called cardiology technologists. They assist physicians with cardiac catheterization procedures in which a small tube, or catheter, is inserted in patients to …Read More