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Abstract
Purpose: Our first aim was to compare online M-mode with offline spatiotemporal image correlation (STIC) M-mode for assessing longitudinal annular displacement (LAD) in growth-restricted fetuses (FGR). Our second aim was to compare LAD measures of FGR cases with controls.
Materials and methods: Prospective study including 40 FGR cases (defined estimated fetal weight and birth weight <10th centile) and 72 normally grown fetuses matched to cases by gestational age at scan. LAD was measured with online M-mode and offline STIC M-mode at the left and right ventricular free walls and septum in all fetuses.
Results: FGR cases had a significant decrease in LAD by STIC in all sites as compared to controls (e.g. right LAD in FGR mean 6.7 mm (SD 1.2) versus controls 7.2 mm (1.2), p = .033). There was a non-significant trend for lower values in FGR when using online M-mode (e.g. right LAD in FGR 6.9 mm (1.5) versus controls 7.4 mm (1.5), p = .084).
Conclusions: STIC M-mode seems a better method than online M-mode for detecting subtle changes in myocardial motion. STIC presents more precise results and allows an ideal placement of the M-mode arrow. These results confirm previous data suggesting decreased longitudinal motion in FGR.
Acknowledgements
This study was supported by grants from the Graduate School of Medical Sciences of the University of Groningen, the research institute BCN-BRAIN, the Ministerio de Economia y Competitividad (ref. SAF2012–37196), the Instituto de Salud Carlos III (ref. PI11/00051, PI11/01709, PI12/02230) integrado en el Plan Nacional de I + D + I y cofinanciado por el ISCIII-Subdirección General de Evaluación y el Fondo Europeo de Desarrollo Regional (FEDER) “Otra manera de hacer Europa”, the Cerebra Foundation for the Brain Injured Child (Carmarthen, Wales, UK), Obra Social “la Caixa”, the Fundación Mutua Madrileña, and AGAUR 2014 SGR grant no. 928.
Disclosure statement
None of the authors has any conflict of interest to disclose.