Enhanced sensitivity of dobutamine stress echocardiography by observing wall motion abnormalities during the recovery phase after acute beta-blocker administration - Karagiannis, Stefanos E; Bax, Jeroen J; Elhendy, Abdou; Feringa, Herman HH; Cokkinos, Dennis V; van Domburg, Ron; Simoons, Maarten; Poldermans, Daniel (The American journal of cardiology, 2006)