A chemical stress test uses medications to simulate your heart’s response to exercise. A stress test can assess how well your heart performs during exercise. Your doctor may suggest a stress test if ...

A sealed source means radioactive material that is permanently bonded or fixed in a capsule or matrix designed to prevent release and dispersal of the radioactive material under the most severe ...

A study led by scientists at Johns Hopkins Bloomberg School of Public Health suggests that advanced algorithms working from large chemical databases can predict a new chemical's toxicity better than ...