Cardiovascular science is the study of the heart and blood vessels in the human body. Professionals in the field operate heart-lung diagnostic machines and perform circulatory and cardiac procedures. Cardiovascular science covers health diagnostics, diseases and treatments of the heart and blood vessels comprising the human circulatory system. The field of cardiovascular science offers many educational and professional options for interested students. Degree programs, from 2-year to graduate-level degrees, prepare students to perform increasingly complex medical interventions in the cardiovascular system.