- Poster presentation
- Open Access
Segmental variation of myocardial deformation in patients with suspected ischemic heart disease
© Haraldsson et al; licensee BioMed Central Ltd. 2012
- Published: 1 February 2012
- Late Gadolinium Enhancement
- Spatial Dependency
- Circumferential Strain
- Regional Deformation
- County Council
The aim of this study is to investigate if the use of individual, per segment reference values for cardiac strain allows for improved discrimination of pathological deformation. In a cohort of patients with a high likelihood of ischemic heart disease, preliminary results within the subgroup of patients without pathological findings on cardiac MRI suggest a spatial dependency of strain.
In addition to perfusion and viability, systolic myocardial function constitutes one of the cornerstones in the evaluation of ischemic patients. Technical achievements have improved the accuracy of the quantitative assessment of myocardial function, allowing for better discrimination between healthy and diseased myocardium. These advances cannot be fully exploited without knowledge of the spatial dependency and individual variance of deformation in health and disease.
In an ongoing study, a large cohort of patients with moderate chest pain and a high likelihood of coronary artery disease undergo cardiac MRI including cine loops for wall motion, perfusion at rest and during adenosine stress, acquisition of myocardial deformation with displacement encoding with stimulated echo (DENSE), and late gadolinium enhancement to demonstrate scar tissue.
In this preliminary study, patient demonstrating maintained perfusion, normal wall motion, and no signs of scar at late gadolinium enhancement were selected for further evaluation.
Regional deformation acquired with DENSE was evaluated in terms of radial and circumferential strains. All measurements were reported according to the seventeen segment model of the AHA. The apical cap was excluded from the quantification of regional deformation.
Preliminary results suggest a spatial dependency in deformation, larger than the fairly low standard deviation obtained using DENSE MRI. Hence, taking natural segmental variation of myocardial deformation into account might allow for better discrimination between normal and impaired myocardial deformation.
County Council of Östergötland, Heart Foundation, Swedish Heart-Lung Foundation, and Swedish Research Council.
This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.