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In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
11:16

In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging

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Reproducibility of the proximal flow convergence method in mitral and tricuspid regurgitation

Georg Grossmann1, Albrecht Hoffmeister, Armin Imhof

  • 1Department of Internal Medicine, Division of Cardiology, University of Ulm, Ulm, Germany. georg.grossmann@medizin.uni-ulm.de

American Heart Journal
|April 13, 2004
PubMed

Insights

The flow convergence method for assessing mitral and tricuspid regurgitation shows good reproducibility. This echocardiography technique is reliable regardless of the investigator's experience, aiding in patient follow-up.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Accurate follow-up of patients with mitral regurgitation (MR) and tricuspid regurgitation (TR) is crucial for effective clinical management.
  • The flow convergence method is a key echocardiographic technique used in assessing valvular regurgitation severity.

Purpose of the Study:

  • To evaluate the reproducibility of the proximal flow convergence method in quantifying mitral and tricuspid regurgitation.
  • To determine if investigator experience impacts the reliability of this echocardiographic measurement.

Main Methods:

  • Color Doppler echocardiography was used to image the proximal flow convergence region in 83 patients with MR, TR, or both.
  • Proximal isovelocity surface area (PISA) radii were measured using aliasing velocities of 27-29 cm/s and 41-43 cm/s.
  • Measurements were repeated by the same investigator on different days (intraobserver variability) and by different investigators (interobserver variability).

Main Results:

  • Intraobserver variability for PISA radii was low, with 95% ranges of +/- 2.7 mm (for 27-29 cm/s) and +/- 1.8 mm (for 41-43 cm/s).
  • Interobserver variability was also low, with 95% ranges of +/- 2.7 mm (for 27-29 cm/s) and +/- 2.4 mm (for 41-43 cm/s).
  • Variability was independent of the investigators' experience, with similar findings for both mitral and tricuspid regurgitation.

Conclusions:

  • The proximal flow convergence method demonstrates acceptable reproducibility for assessing mitral and tricuspid regurgitation.
  • The reliability of the method is not influenced by the experience level of the echocardiography investigator.
  • A change in PISA radius greater than 2.7 mm (or 2.4 mm) is needed to indicate a change in regurgitation severity in an individual patient.
Abstract

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