Editing Thallium (section)

====Thallium stress test====
A thallium stress test is a form of [[scintigraphy]] in which the amount of thallium in tissues correlates with tissue blood supply. Viable cardiac cells have normal [[Na+/K+-ATPase|Na<sup>+</sup>/K<sup>+</sup> ion-exchange pumps]]. The Tl<sup>+</sup> cation binds the K<sup>+</sup> pumps and is transported into the cells. Exercise or [[dipyridamole]] induces widening ([[vasodilation]]) of arteries in the body. This produces [[coronary steal]] by areas where arteries are maximally dilated. Areas of infarct or [[Ischemia|ischemic tissue]] will remain "cold". Pre- and post-stress thallium may indicate areas that will benefit from myocardial [[revascularization]]. Redistribution indicates the existence of coronary steal and the presence of ischemic [[coronary artery disease]].<ref>{{cite book |url=https://books.google.com/books?id=u_A5BSqsb20C&pg=PA100 |page=100 |title=Primary care cardiology |author=Taylor, George J. |publisher=Wiley-Blackwell |date=2004 |isbn=978-1-4051-0386-2 |access-date=2016-09-26 |archive-date=2020-03-12 |archive-url=https://web.archive.org/web/20200312164133/https://books.google.com/books?id=u_A5BSqsb20C&pg=PA100 |url-status=live }}</ref>