Obstruction of the St. Jude Medical Valve - Diagnostic and Therapeutic Values of Cineradiography - Aoyagi, S; Higa, Y; Matsuzoe, S; Nishi, Y; Tanaka, K; Kawara, T; Oryoji, A; Kosuga, K; Oishi, K (The Thoracic and Cardiovascular Surgeon, 1993)