Evidence map›Paper›PMID 28389690›Full record

ArticleHeart and vessels2017

Energy dynamics of the intraventricular vortex after mitral valve surgery.

Kouki Nakashima, Keiichi Itatani, Tadashi Kitamura, Norihiko Oka, Tetsuya Horai, Shohei Miyazaki, Masaki Nie, Kagami Miyaji

Abstract read
PubMed Publisher
In one paragraph

Article in Heart and vessels, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.9field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 36 citations in OpenAlex.

  1. Hemodynamic Evaluation for Mitral Valve Replacement.Annals of biomedical engineering · 2026
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  6. Intracardiac flow dynamics in mitral regurgitation: state of the art.European heart journal. Imaging methods and practice · 2025
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 1 country.

Kouki NakashimaDepartment of Cardiovascular Surgery, Ebina General Hospital, 1320, Kawaraguchi, Ebina, 243-1311, Kanagawa, Japan.
Keiichi ItataniDepartment of Cardiovascular Surgery, Kyoto Prefectual University of Medicine, 465 Kajii-cho, Hirokoji Agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan. keiichiitatani@yahoo.co.jp.
Tadashi KitamuraDepartment of Cardiovascular Surgery, Kitasato University School of Medicine, 1-15-1, Kitasato Minami-ku, Sagamihara, 252-0375, Kanagawa, Japan.
Norihiko OkaDepartment of Cardiovascular Surgery, Kitasato University School of Medicine, 1-15-1, Kitasato Minami-ku, Sagamihara, 252-0375, Kanagawa, Japan.
Tetsuya HoraiDepartment of Cardiovascular Surgery, Kitasato University School of Medicine, 1-15-1, Kitasato Minami-ku, Sagamihara, 252-0375, Kanagawa, Japan.
Shohei MiyazakiDepartment of Hemodynamic Analysis, Kitasato University School of Medicine, 1-15-1, Kitasato Minami-ku, Sagamihara, 252-0375, Kanagawa, Japan.
Masaki NieDepartment of Cardiovascular Surgery, Ebina General Hospital, 1320, Kawaraguchi, Ebina, 243-1311, Kanagawa, Japan.
Kagami MiyajiDepartment of Hemodynamic Analysis, Kitasato University School of Medicine, 1-15-1, Kitasato Minami-ku, Sagamihara, 252-0375, Kanagawa, Japan.
Kitasato University · JPEbina General Hospital · JPKyoto Prefectural University of Medicine · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mitral valve morphology after mitral valve surgery affects postoperative intraventricular flow patterns and long-term cardiac performance. We visualized ventricular flow by echocardiography vector flow mapping (VFM) to reveal the impact of different mitral valve procedures. Eleven cases of mechanical mitral valve replacement (nine in the anti-anatomical and two in the anatomical position), three bioprosthetic mitral valve replacements, and four mitral valve repairs were evaluated. The mean age at the procedure was 57.4 ± 17.8 year, and the echocardiography VFM in the apical long-axis view was performed 119.9 ± 126.7 months later. Flow energy loss (EL), kinetic pressure (KP), and the flow energy efficiency ratio (EL/KP) were measured. The cases with MVR in the anatomical position and with valve repair had normal vortex directionality ("Clockwise"; N = 6), whereas those with MVR in the anti-anatomical position and with a bioprosthetic mitral valve had the vortex in the opposite direction ("Counterclockwise"; N = 12). During diastole, vortex direction had no effect on EL ("Clockwise": 0.080 ± 0.025 W/m; "Counterclockwise": 0.083 ± 0.048 W/m; P = 0.31) or KP ("Clockwise": 0.117 ± 0.021 N; "Counterclockwise": 0.099 ± 0.057 N; P = 0.023). However, during systole, the EL/KP ratio was significantly higher in the "Counterclockwise" vortex than that in the "Clockwise" vortex (1.056 ± 0.463 vs. 0.617 ± 0.158; P = 0.009). MVP and MVR with a mechanical valve in the anatomical position preserve the physiological vortex, whereas MVR with a mechanical valve in the anti-anatomical position and a bioprosthetic mitral valve generate inefficient vortex flow patterns, resulting in a potential increase in excessive cardiac workload.

Indexed as

BioprosthesisHeart Valve ProsthesisHeart Valve Prosthesis ImplantationBlood Flow VelocityDiastoleEchocardiographyFemaleHeart VentriclesHumansMaleMiddle AgedMitral ValveMitral Valve InsufficiencySystoleFlow energy lossMitral valve surgeryVector flow mapping (VFM)

Identifiers

PMID28389690
OpenAlexW2605065815

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.