Association of early administration of furosemide with improved oxygenation in patients with acute heart failure oleh Takafumi Mikami, Masanobu Ishii, Nobuyasu Yamamoto, Kyohei Marume, Michikazu Nakai, Soshiro Ogata, Ryota Kaichi, Sou Ikebe, Takayuki Mori, Soichi Komaki, Hiroaki Kusaka, Reiko Toida, Kazumasa Kurogi, Yoshitaka Iwanaga, Hisao Ogawa, Yoshihiro Miyamoto, Kenichi Tsujita