Dynamic changes in microcirculatory blood flow during dobutamine stress assessed by quantitative myocardial contract echocardiography - Mathias Junior, Wilson; Kowatsch, Ingrid; Saroute, Ally Nader; Osório, Altamiro Filho Ferraz; Sbano, João César Nunes; Dourado, Paulo Magno Martins; Ramires, José Antônio Franchini; Tsutsui, Jeane Mike (Echocardiography, 2011)