Abstract 15261: Comparison of Left Atrial Mechanics Between Different Techniques of Two-Dimensional Speckle Based Strain in Patients with Atrial Fibrillation: Velocity Vector Imaging versus 2-Dimensional Strain
Background: Speckle tracking measurement of left atrial (LA) strain (ε) allows evaluation of contractile, reservoir, and conduit function. We sought to compare LA ε with velocity vector imaging (VVI) and two-dimensional strain (2DS).
Methods: LA ε and strain rate (SR) were compared in 141 patients (62+/-10 years) using both VVI and 2DS. Peak negative, peak positive, and total ε (corresponding to LA contractile, conduit, and reservoir function) were measured during sinus rhythm. Late negative SR (LA contraction), peak positive SR (LV systole), and early negative SR (LV early diastole) were measured.
Results: LA ε measurement was highly feasible with both VVI (93%) and 2DS (93%). Peak negative, positive and total ε correlated well (r=0.78, 0.75, 0.79), with low mean differences (Figure and Table). LA contraction, peak positive and negative SR correlated less well (r=0.74, 0.7, 0.67) with higher mean differences (Table).
Conclusion: Left atrial ε measurement is feasible with both VVI and 2DS in clinical practice. LA ε and SR measurements using VVI showed quite similar results with 2DS.
- © 2011 by American Heart Association, Inc.