Comparison of Myocardial Deformation by Speckle-Tracking Echocardiography and Cardiac Magnetic Resonance in Patients

Elena Sanz Pascual1, Montserrat Bret Zurita2, Jesus Diez Sebastián3

  • 1Department of Pediatric Cardiology, La Paz University Hospital, Madrid, Spain.

Insights

Speckle-tracking echocardiography (STE) can help detect early ventricular dysfunction in Fontan circulation patients. A new algorithm using STE parameters shows 100% sensitivity and negative predictive value for identifying dysfunction, potentially reducing the need for cardiac magnetic resonance (CMR).

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Echocardiography
  • Cardiac Imaging

Background:

  • Patients with Fontan circulation have improved survival but often experience reduced cardiac function and exercise capacity.
  • Cardiac magnetic resonance (CMR) is the gold standard for assessing ventricular function, but speckle-tracking echocardiography (STE) shows promise as a myocardial deformation technique.
  • Early detection of myocardial dysfunction is crucial for managing patients with Fontan circulation.

Purpose of the Study:

  • To validate STE and conventional echocardiography parameters against CMR in Fontan circulation patients.
  • To compare the diagnostic accuracy of STE and conventional echocardiography with CMR.
  • To develop a diagnostic algorithm using STE parameters for early detection of myocardial dysfunction.

Main Methods:

  • A cross-sectional study involving 64 patients with Fontan circulation.
  • Measurements included longitudinal and circumferential strain, strain rates, and conventional echocardiographic parameters.
  • Ventricular volumes and ejection fraction (EF) were assessed using CMR.

Main Results:

  • Seven patients (11%) showed ventricular dysfunction (EF <45% by CMR).
  • No significant correlation was found between individual STE parameters or conventional echocardiography measures and CMR.
  • The developed diagnostic algorithm achieved 100% sensitivity and negative predictive value for detecting ventricular dysfunction, identifying 19 patients (40.1%) without dysfunction and no false negatives.

Conclusions:

  • STE is a valuable complementary tool for assessing ventricular function in Fontan patients.
  • The proposed STE-based diagnostic algorithm effectively identifies early ventricular dysfunction.
  • This algorithm can improve diagnostic accuracy and potentially reduce the frequency of CMR follow-up scans.
Abstract