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  1. C100 医学部/医学系研究科
  2. C100b 紀要
  3. Nagoya journal of medical science
  4. 81(2)

Effect of an artificial ring on mitral valve function

https://doi.org/10.18999/nagjms.81.2.207
https://doi.org/10.18999/nagjms.81.2.207
8bd54f18-a29a-4800-9e8d-e01f0c266bca
名前 / ファイル ライセンス アクション
04_Yokote.pdf 04_Yokote.pdf (3.4 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2019-06-13
タイトル
タイトル Effect of an artificial ring on mitral valve function
著者 Yokote, Jun

× Yokote, Jun

WEKO 92000

Yokote, Jun

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Araki, Yoshimori

× Araki, Yoshimori

WEKO 92001

Araki, Yoshimori

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Saito, Shunei

× Saito, Shunei

WEKO 92002

Saito, Shunei

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Hasegawa, Hiroki

× Hasegawa, Hiroki

WEKO 92003

Hasegawa, Hiroki

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Usui, Akihiko

× Usui, Akihiko

WEKO 92004

Usui, Akihiko

Search repository
キーワード
主題Scheme Other
主題 mitral valve
キーワード
主題Scheme Other
主題 annuloplasty ring
キーワード
主題Scheme Other
主題 heart physiology
キーワード
主題Scheme Other
主題 isolated heart model
抄録
内容記述 Differences of the effect of annuloplasty rings on the mitral annulus and leaflets, and differences between types of annuloplasty rings are not well known. We analyzed annular motion and leaflet movement with a rigid or flexible ring and without a ring using an isolated swine working heart model. Hearts of 10 swine (weight: 40–50 kg) were used for a rigid ring (n=5) and a flexible ring (n=5). Four ultrasound crystal tips were fixed around the annulus and an annuloplasty ring was implanted in the isolated heart. In the working heart mode, measurement of mitral annular dimension was acquired by sonomicrometry. Images of mitral valve motion were acquired by a high-speed video camera. The same analyses were performed after removing the artificial ring. The antero-posterior diameter of the diastole distance was significantly reduced in the flexible ring (21.59±0.71 mm) and rigid ring (15.93±1.88 mm) compared with no ring (23.51±2.01 mm). The flexible ring made the transverse diameter shrink significantly more than did the rigid ring. The contraction range of the transverse diameter was significantly smaller in the flexible ring compared with no ring. The duration of opening to closing of the mitral leaflet with the rigid (124.7±4.4 ms) and flexible rings (107.9±3.5 ms) was significantly shorter than that with no ring (168±36.5 ms). Annuloplasty rings allow simplicity of leaflet motion, regardless of the type of artificial ring. In a flexible ring, the mitral annulus shows a vertically long shape, suggesting preservation of posterior annular movement.
内容記述タイプ Abstract
出版者
出版者 Nagoya University Graduate School of Medicine, School of Medicine
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.18999/nagjms.81.2.207
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://www.med.nagoya-u.ac.jp/medlib/nagoya_j_med_sci/812.html
ISSN(print)
収録物識別子タイプ ISSN
収録物識別子 0027-7622
ISSN(Online)
収録物識別子タイプ ISSN
収録物識別子 2186-3326
書誌情報 Nagoya Journal of Medical Science

巻 81, 号 2, p. 207-215, 発行日 2019-05
著者版フラグ
値 publisher
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