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Doppler tissue echocardiographic features of cardiac amyloidosis

Przemyslsoław Palka1, Aleksandra Lange, J Elisabeth Donnelly

  • 1Department of Cardiology, The Prince Charles Hospital, Brisbane, Australia. ppalka@hotmail.com

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|November 5, 2002
PubMed

Insights

Doppler tissue echocardiography (DTE) effectively quantifies myocardial involvement in cardiac amyloidosis (CA). DTE parameters accurately differentiate CA patients from controls, aiding diagnosis even with subtle echocardiographic findings.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Biophysics

Background:

  • Cardiac amyloidosis (CA) is a progressive infiltrative disease affecting the heart.
  • Accurate echocardiographic characterization is crucial for diagnosing and managing CA.
  • Conventional echocardiography can sometimes present borderline findings, necessitating advanced techniques.

Purpose of the Study:

  • To evaluate if Doppler tissue echocardiography (DTE) improves the accuracy of echocardiographic characterization of cardiac amyloidosis (CA).
  • To assess the utility of DTE-derived myocardial velocities in differentiating CA patients from healthy controls.
  • To identify specific DTE parameters that can distinguish between restrictive and nonrestrictive filling patterns in CA.

Main Methods:

  • Studied 36 patients with CA and 40 age-matched controls.
  • Measured peak mitral annulus velocities using pulsed wave DTE.
  • Quantified mean myocardial velocities (MMV) and myocardial velocity gradient (MVG) using color M-mode DTE during various cardiac cycle phases.

Main Results:

  • DTE-derived mitral annulus velocities, MMV, and MVG were significantly lower in CA patients compared to controls.
  • Specific DTE parameters, including early and late isovolumic relaxation (IVR) indices, accurately differentiated CA patients from controls with high accuracy (0.81-0.87).
  • Reduced early IVR-MMV in CA patients was independent of age and left ventricular mass.

Conclusions:

  • Doppler tissue echocardiography (DTE) significantly enhances the accuracy of echocardiographic characterization in cardiac amyloidosis (CA).
  • DTE indices are valuable for differentiating CA patients from controls, including those with non-restrictive filling patterns or borderline conventional echocardiographic features.
  • Quantification of myocardial involvement by DTE offers a robust method for diagnosing CA.

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