Aortic Valve Replacement for Severe Aortic Stenosis with Severe Left Ventricular Dysfunction - Higashi, Akihiro; Iguro, Yoshifumi; Ueno, Tetsuya; Terai, Hiromu; Yamamoto, Hiroyuki; Ueno, Masahiro; Ueno, Takayuki; Sakata, Ryuzo (Japanese Journal of Cardiovascular Surgery, 2006)