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Mitral valve remodeling in the development of obstructive hypertrophic cardiomyopathy

Francesco Moroni1, Abhishek Chaturvedi2, Ehsan Jafree2

  • 1VCU Pauley Heart Center, Virginia Commonwealth University, Richmond, VA, USA; The Robert M Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA.

Indian Heart Journal
|June 22, 2023
PubMed

Insights

Mitral valve remodeling contributes to left ventricular outflow tract obstruction (LVOTO) in hypertrophic cardiomyopathy (HCM). Longer mitral valve leaflets predict the development of LVOTO over time in HCM patients.

Area of Science:

  • Cardiology
  • Cardiovascular Research
  • Medical Imaging

Background:

  • Hypertrophic cardiomyopathy (HCM) frequently causes left ventricular outflow tract obstruction (LVOTO).
  • The role of mitral valve remodeling in the progression of LVOTO in HCM is not well understood.

Purpose of the Study:

  • To investigate the contribution of mitral valve remodeling to the development of LVOTO in patients with hypertrophic cardiomyopathy.

Main Methods:

  • Retrospective analysis of 40 HCM patients without baseline obstruction.
  • Median follow-up duration of 2179 days.
  • Assessment of mitral valve leaflet lengths and development of LVOTO.

Main Results:

  • 13 out of 40 patients developed significant LVOTO during follow-up.
  • Patients who developed LVOTO had significantly longer posterior leaflets.
  • Longer anterior leaflet residual length was also observed in patients with developing LVOTO.

Conclusions:

  • Mitral valve leaflet elongation is associated with the progression of LVOTO in HCM.
  • These findings suggest mitral valve remodeling is a key factor in HCM obstruction development.

Keywords:
Hypertrophic cardiomyopathyLeft ventricular tract obstructionMitral valveSystolic anterior motion

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