Objective: To explore the value of three-dimensional speckle-tracking imaging (3DSTI) in detecting left ventricular systolic function in patients with dilated cardiomyopathy (DCM).
Methods: Totally 31 DCM patients were enrolled in this study. Left ventricular end-systolic volume (LVESV), left ventricular end-diastolic volume (LVEDV), and left ventricular ejection fraction (LVEF) were measured using the 3DSTI, two-dimensional echocardiography (2DE), and magnetic resonance imaging (MRI). Left ventricular end-diastolic mass (EDmass) and left ventricular end-diastolic mass index (LVEDmass I) were also detected by 3DSTI and MRI. The differences in these measurements were analyzed and compared.
Results: The values of LVESV, LVEDV, and LVEF showed significantly positive correlations among 2DE group, 3DSTI group, and MRI group. The LVEF value showed significant difference among these three groups [(33.3 ± 11.1)%, (30.3 ± 10.6)%, and (26.2 ± 10.7)%; P = 0.04], whereas LVEDV and LVESV values were not significantly different (P > 0.05; respectively). Inter-group comparison showed the mean of LVEF was significantly lower in MRI group than in 2DE group (P = 0.031), whereas there was no significant difference between 2DE group and 3DSTI group and between 3DSTI group and MRI group (P > 0.05; respectively). The EDmass and EDmassI detected by 3DSTI and MRI were (143.2 ± 40.2) g vs (190.0 ± 58.3) g and (83.2 ± 21.1) g/m2 vs (110.1 ± 29.7) g/m2 (P < 0.001; respectively).
Conclusions: The LVEF value detected by 3DSTI is closer to that detected by MRI in DCM patients.
Keywords: dilated cardiomyopathy; echocardiography; left ventricular systolic function; magnetic resonance imaging; three-dimensional speckle-tracking imaging.
© 2019 The Authors. Echocardiography Published by Wiley Periodicals, Inc.