Cardiac nuclear medicine cardiac nuclear medicine imaging evaluates the heart for coronary artery disease and cardiomyopathy diseases of the heart muscle it also may be used to help determine whether the heart has been damaged by chemotherapy or radiotherapy. A nuclear heart scan is an imaging test that uses special cameras and a radioactive substance called a tracer to create pictures of your heart overview the tracer is injected into your blood and travels to your heart. Cardiac nuclear medicine our nuclear cardiology department is a fully accredited laboratory with the intersocietal commission for the accreditation of nuclear medicine laboratories icanlthis accreditation is the foundation to create achieve and to ensure the highest quality patient care. A nuclear medicine nm cardiac stress test assesses the blood supply to the heart and provides information about how the heart is working images or pictures are taken of the heart while at rest and after the heart is stressed