Fast Fourier transform analysis of intraoperative transit-time flow measurement during coronary artery bypass grafting. - Takami, Yoshiyuki; Maekawa, Atsuo; Yamana, Koji; Akita, Kiyotoshi; Amano, Kentaro; Matsuhashi, Kazuki; Niwa, Wakana; Takagi, Yasushi (Journal of Cardiothoracic Surgery, 2024)