Myocardial strain assessment using Velocity Vector Imaging in normally grown fetuses at term

Alsolai, Amal A., Bligh, Larissa N., Greer, Ristan M., Gooi, Alexander and Kumar, Sailesh (2017) Myocardial strain assessment using Velocity Vector Imaging in normally grown fetuses at term. Ultrasound in Obstetrics and Gynecology, . doi:10.1002/uog.17549


Author Alsolai, Amal A.
Bligh, Larissa N.
Greer, Ristan M.
Gooi, Alexander
Kumar, Sailesh
Title Myocardial strain assessment using Velocity Vector Imaging in normally grown fetuses at term
Journal name Ultrasound in Obstetrics and Gynecology   Check publisher's open access policy
ISSN 1469-0705
0960-7692
Publication date 2017-06-13
Year available 2017
Sub-type Article (original research)
DOI 10.1002/uog.17549
Open Access Status Not yet assessed
Total pages 17
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Language eng
Abstract The aim was to prospectively assess fetal myocardial deformation at term in normally grown fetuses, using Velocity Vector Imaging (VVI) 2D speckle-tracking technique and explore myocardial deformation changes over the last four weeks of pregnancy.

This was a prospective, observational, cohort study, at the Mater Mother's Hospital, Brisbane, Australia. A cohort of 276 women with uncomplicated singleton pregnancies underwent fortnightly ultrasound from 36 weeks until delivery. Fetal myocardial deformation (global and segmental longitudinal systolic myocardial strain and strain rate of both right and left ventricles) were measured using Velocity Vector Imaging software.

Global longitudinal left and right ventricular strain and strain rate mean values decreased between each time point. At 36, 38 and 40 weeks the LV global strain (%) and strain rate (s-1) respectively decreased as follows: 36 weeks [-14.6% (±3.8), -1.2 s-1 (±0.3)], 38 weeks [-13.6% (±3.3), -1.1 s-1 (±0.3)] and 40 weeks [-12.3% (±3.1), -1.0 s-1 (±0.3)]. At 36, 38 and 40 weeks the mean RV global strain (%) and mean strain rate (s-1) respectively decreased as follows: 36 weeks [-14.2% (±3.4), -1.2 s-1 (±0.2)], 38 weeks [-13.4% (±3.0), -1.1 s-1 (±0.2)] and 40 weeks [-12.8% (±2.8), -1.1 s-1 (±0.3)].

Global ventricular strain values diminish with advancing gestational age. Myocardial deformation imaging is feasible at late gestation and may be useful as an adjunct for assessment of fetal cardiac function close to birth.
Keyword Fetal echocardiography
Myocardial deformation
Pregnancy
Speckle tracking
Strain
Strain rate
Velocity vector imaging
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Wed, 01 Nov 2017, 10:36:52 EST by Johanna Barclay on behalf of Mater Research Institute-UQ