Editorial: Regadenoson: An adenosine A2A receptor agonist for pharmacological myocardial perfusion imaging

Myocardial flow reserve measurement is the gold standard for risk stratification in patients with suspected coronary artery disease [1]. Vasodilator pharmacological stress myocardial perfusion imaging is based on the heterogeneity of radioisotope uptake in the myocardium being supplied by significantly diseased versus non-diseased coronary artery. Indications for pharmacological stress test are listed in Table 1. Pharmacologic stress perfusion imaging is an excellent adjunctive method for identifying high- and low-risk patients from an intermediate-clinical risk pool [2,3].