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Computed tomography for planning and postoperative imaging of transvenous mitral annuloplasty: first experience in an animal model

Sündermann, Simon ; Gordic, Sonja ; Manka, Robert ; Cesarovic, Nikola ; Falk, Volkmar ; Maisano, Francesco ; Alkadhi, Hatem

In: The International Journal of Cardiovascular Imaging, 2015, vol. 31, no. 1, p. 135-142

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    Titre
    • Computed tomography for planning and postoperative imaging of transvenous mitral annuloplasty: first experience in an animal model
    Auteur
    • Sündermann, Simon. Division of Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
    • Gordic, Sonja. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
    • Manka, Robert. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
    • Cesarovic, Nikola. Department of Surgical Research, University Hospital Zurich, Zurich, Switzerland
    • Falk, Volkmar. Division of Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
    • Maisano, Francesco. Division of Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
    • Alkadhi, Hatem. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • The International Journal of Cardiovascular Imaging, 2015, vol. 31, no. 1, p. 135-142. Springer Netherlands
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:331612
    Summary
    To investigate the use of computed tomography (CT) to measure the mitral valve annulus size before implantation of a percutaneous mitral valve annuloplasty device in an animal trial. Seven domestic pigs underwent CT before and after implantation of a Cardioband™ (a percutaneously implantable mitral valve annuloplasty device) with a second-generation 128-section dual-source CT machine. Implantation of the Cardioband™ was performed in a standard fashion according to a protocol. Animals were sacrificed afterwards and the hearts explanted. The Cardioband™ was found to be adequately implanted in all animals, with no anchor dehiscence and no damage of the circumflex artery (CX) or the coronary sinus (CS). The correct length of the band as chosen according to the length of the posterior mitral annulus measured in CT before implantation was confirmed in gross examination in all animals. The device did not result in a metal artifact-related degradation of image quality. The closest distance from the closest anchor to the CX was 2.1±0.7mm in diastole and 1.6±0.5mm systole. Mitral annulus distance to the CS was 6.4±1.3mm in diastole and 7.7±1.1mm in systole. CT visualization and measurement of the mitral valve annulus dimensions is feasible and can become the imaging method of choice for procedure planning of Cardioband™ implantations or other transcatheter mitral annuloplasty devices.