What is another name for Lexiscan?

Lexiscan is another name for regadenoson, which is a pharmacological agent used as a pharmacologic stress agent in myocardial perfusion imaging. Regadenoson is a selective adenosine A2A receptor agonist that induces vasodilation of the coronary arteries, similar to the effects of exercise, and is used in patients who may not be able to undergo traditional exercise stress tests.

Understanding this, regadenoson provides a non-invasive method to assess cardiac function and perfusion, which is particularly useful in patients with contraindications to exercise or those unable to walk on a treadmill.

In contrast, adenosine is a naturally occurring nucleoside that has similar vasodilatory effects but is not a direct substitute for Lexiscan, as regadenoson was specifically developed for this purpose with a more favorable dosing profile and fewer side effects. Dipyridamole is another vasodilator but works through a different mechanism and is not synonymous with Lexiscan. Dobutamine, on the other hand, is a sympathomimetic agent that increases heart rate and contractility and is typically used in different clinical scenarios. Thus, regadenoson stands out as the correct answer in this context.