Preoperative mitral valve annulus area size is an important factor in avoiding functional mitral stenosis after mitral valve repair

• Published in: Journal of echocardiography 2024-11
• Main Authors: Sasaki, Haruka, Takaoka, Hiroyuki, Yoshida, Kazuki, Matsumoto, Moe, Nishikawa, Yusei, Noguchi, Yoshitada, Aoki, Shuhei, Suzuki, Katsuya, Yashima, Satomi, Kinoshita, Makiko, Suzuki-Eguchi, Noriko, Takanashi, Shuichiro, Matsumiya, Goro, Kobayashi, Yoshio
• Format: Article
• Language: English
• ISSN: 1349-0222; 1880-344X; 1880-344X
• DOI: 10.1007/s12574-024-00671-x

Functional mitral stenosis (FMS) following mitral valve (MV) repair for degenerative mitral regurgitation (DMR) is known as a poor prognostic factor. The parameters for avoiding postoperative FMS in MV repair for DMR have not been established. Two-hundred-and-twenty patients (mean age 61.1 ± 13.3 years, 144 males) who underwent MV repair for DMR were analyzed. MV annulus area was measured pre- and postoperatively using three-dimensional transesophageal echocardiography (TEE). Trans-mitral pressure gradient (TMPG) was evaluated by postoperative transthoracic echocardiography and FMS was defined as a mean TMPG ≥ 5 mmHg. FMS was present in 14 patients (6.4%). Pre- versus postoperative MV annulus area change ratio was greater in the FMS group than in the non-FMS group (62.5 ± 7.2% vs. 48 ± 11.2%, p