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Related Experiment Video

Updated: Apr 23, 2026

Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification
07:34

Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification

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Tricuspid annulus: a three-dimensional deconstruction and reconstruction.

Khurram Owais1, Charles E Taylor2, Luyang Jiang3

  • 1Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.

The Annals of Thoracic Surgery
|September 25, 2014
PubMed
Summary

The tricuspid annulus is a dynamic, multiplanar structure that changes shape throughout the cardiac cycle. Understanding its regional behavior is crucial for improving tricuspid annuloplasty device design and effectiveness.

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Area of Science:

  • Cardiovascular anatomy and physiology
  • Echocardiography and cardiac imaging
  • Surgical device engineering

Background:

  • Tricuspid annulus dilation and flattening precede regurgitation in right ventricular dysfunction.
  • Prophylactic tricuspid annuloplasty is considered even without significant tricuspid regurgitation.
  • Normal tricuspid annulus geometry analysis is important due to the prognostic value of annuloplasty.

Purpose of the Study:

  • To critically analyze the geometry and dynamic behavior of the normal tricuspid annulus.
  • To provide insights for optimizing tricuspid annuloplasty device design.

Main Methods:

  • Analysis of 3D transesophageal echocardiographic data from 26 patients.
  • Utilized Image Arena software for data processing and MATLAB for annular metric computation.
  • Computed annular metrics including size, shape, and motion.

Main Results:

  • The tricuspid annulus showed significant changes in area and perimeter during the cardiac cycle, peaking at end diastole.
  • Confirmed true annular expansion with strong correlation between 2D and 3D area changes.
  • Demonstrated heterogeneous regional dynamics, with the anterolateral region being most dynamic and the anteroseptal region least dynamic and most nonplanar.
  • Observed significant vertical translational motion of the annulus.

Conclusions:

  • The tricuspid annulus is a dynamic, multiplanar structure with distinct regional behaviors.
  • These dynamic and geometric characteristics are essential for designing effective annuloplasty devices.
  • Heterogeneous regional behavior must be considered for optimal tricuspid annuloplasty outcomes.