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Excessive papillary muscle traction and dilated mitral annulus in mitral valve prolapse without mitral regurgitation.

AbstractThis study demonstrated excessive papillary muscle displacement during peak systole but normal mitral annulus function during the cardiac cycle in patients with mitral valve prolapse and no mitral regurgitation. The excessive papillary muscle displacement may play an important role in the pathogenesis of the superior displacement of mitral leaflets in patients with mitral valve prolapse.
AuthorsT M Lee, S F Su, T Y Huang, M F Chen, C S Liau, Y T Lee (Affiliation: College of Medicine, National Taiwan University.)
JournalThe American journal of cardiology (Am J Cardiol) Vol. 78 Issue 4 Pg. 482-5 (Aug 15 1996) ISSN: 0002-9149 UNITED STATES
PMID8752199 (Publication Type: Journal Article)
Topics
  • Adolescent
  • Adult
  • Cardiac Volume
  • Dilatation, Pathologic (pathology, physiopathology, ultrasonography)
  • Echocardiography
  • Female
  • Humans
  • Male
  • Mitral Valve (pathology, physiopathology, ultrasonography)
  • Mitral Valve Insufficiency
  • Mitral Valve Prolapse (pathology, physiopathology, ultrasonography)
  • Muscle Contraction
  • Myocardial Contraction
  • Papillary Muscles (physiopathology, ultrasonography)
  • Posture
  • Prospective Studies
  • Stress, Mechanical
  • Systole
  • Ventricular Function, Left