Lexiscan or regadenoson is a stress agent, which typically works by increasing blood flow in the arteries of the heart. Lexiscan is specifically used for radionuclide myocardial perfusion imaging (MPI) in patients who are unable to bear adequate exercise stress. In this test, typically, patients are asked to walk on a treadmill or ride a stationary bicycle. The aim is to increase patient’s heart rate until it is adequately stressed. Plus
