Naoki Chiba
Iwate Medical University
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Publication
Featured researches published by Naoki Chiba.
The Japanese Journal of Thoracic and Cardiovascular Surgery | 2001
Hiroshi Izumoto; Tetsunori Kawase; Kazuaki Ishihara; Kohei Kawazoe; Junya Kamata; Masayuki Mukaida; Takayuki Nakajima; Naoki Chiba; Yoko Yagi; Kiyoyuki Eishi
OBJECTIVE Sinus rhythm gained after the Cox/maze procedure concomitant with mitral valve operation has demonstrated long-term attrition during the follow-up, no information exists on whether the type of mitral valve operation--(repair vs. replacement)--affects this sinus rhythm maintenance rate. We retrospectively studied patients undergoing concomitant mitral valve operation and Cox/maze procedure to answer this question. METHODS Between April 1993 and August 1995, 87 consecutive patients--35 men and 52 women (mean age: 59.3 years)--with chronic atrial fibrillation and mitral valve disease underwent the modified Cox/maze procedure and concomitant mitral valve operation, with 56 having mitral valve repair (repair group) and 31 mitral valve replacement (replacement group). Patients were followed up and changes in rhythm studied retrospectively. RESULTS Follow-up for a mean 51.3 +/- 11.6 months was completed in 82 of 83 long-term survivors (99%). Repair group surgery survival was 98.1 +/- 1.9% at 1 year and 94.2 +/- 3.2% at 5 based on the Kaplan-Meier method. Replacement group surgery survival was 85.7 +/- 5.9% at 1 year and 82.9 +/- 6.4% at 5. Probability in sinus rhythm maintenance for the repair group at 1 year was 88.6 +/- 5.4% and at 5 years was 67.6 +/- 9.1%. Probability in sinus rhythm maintenance for the replacement group at 1 year was 95.7 +/- 4.3% and at 5 years was 65.0 +/- 11.1%. CONCLUSIONS Medium-term results after the Cox/maze III procedure concomitant with mitral valve operation are good. The attrition of sinus rhythm maintenance appears similar by the completion of 5-year follow-up.
Annals of Noninvasive Electrocardiology | 1996
Kenji Nakai; Naoki Chiba; Minoru Shobuzawa; Takehiko Musha; Takahiro Shiroto; Shunichi Hosokawa; Junya Kamata; Tomomi Suzuki; Hidehiko Aoki; Seiichi Saiki; Katsuhiko Hiramori
Background: The pathogenesis of the occurrence of late potentials (LP) has not been fully elucidated. Deletion polymorphism in the Angiotensin I‐converting enzyme (ACE) gene may relate the myocarclial remodeling after the myocardial infarction (Ml). The purpose of this study was to evaluate the significance of ACE gene polymorphism for the occurrence of LPs after Ml.
Japanese Circulation Journal-english Edition | 1991
Kenji Nakai; Chuichi Itoh; Naoki Moriai; Naoki Chiba; Tomoyuki Suzuki; Katsuhiko Hiramori; Satoshi Onishi; Hiroshi Kasanuki; Saichi Hosoda
Japanese Heart Journal | 2003
Masaki Ohsawa; Fumitaka Tanaka; Fusanori Kunugita; Hidenori Saito; Motoyuki Nakamura; Takahiro Shiroto; Kazuhiko Hotta; Naoki Chiba; Katsuhiko Hiramori
Japanese Circulation Journal-english Edition | 2003
Kazuhiko Hotta; Naoki Chiba; Kunihiro Yoshioka; Katsutoshi Terui; Meiichi Itou; Katsuhiko Hiramori
Japanese Circulation Journal-english Edition | 2002
Takayuki Matsuki; Naoki Chiba; Atsushi Doi; Hiroshi Takahashi; Michihiro Iwata; Masaru Shimazaki; Nagara Tamaki; Koichi Morita; Tomoaki Nakata; Kazuaki Shimamoto; Norifumi Ohtani; Seiji Kunimoto; Takashi Sakamoto; Kazuaki Yamauchi; Tsuyoshi Kikuiri; Takeshi Ashie; Fumiaki Terasawa
Japanese Heart Journal | 2000
Kenji Ueshima; Masataka Nasu; Ikuo Segawa; Junnya Kamata; Noboru Kobayashi; Motoyuki Nakamura; Naoki Chiba; Katsuhiko Hiramori
Japanese Circulation Journal-english Edition | 1996
Yoko Yagi; Masayuki Mukaida; Hiroshi Izumoto; Junya Kamata; Kohei Kawazoe; Masataka Nasu; Yoshihiro Sato; Naoki Chiba; Katsuhiko Hiramori
Japanese Circulation Journal-english Edition | 1995
Kenji Nakai; Naoki Chiba; Katsutoshi Terui; Tomonori Itoh; Syunichi Hosokawa; Tomohisa Miyakawa; Katsuhiko Hiramori
Japanese Circulation Journal-english Edition | 1994
Yoko Yagi; Masayuki Mukaida; Yoshitaka Shiina; Tatsuya Sasaki; Kunihiko Abe; Kohei Kawazoe; Naoki Chiba
