- Meeting abstract
- Open Access
116 Contractility reserve in segments non-viable on delayed enhancement; analysis with low dose dobutamine MRI
© Kirschbaum et al; licensee BioMed Central Ltd. 2008
- Published: 22 October 2008
- Public Health
- Coronary Artery
- Wall Thickening
- Coronary Occlusion
Transmural extent of infarction (TEI) of >50% on delayed enhancement (DE) images is considered as non-viable and as a result not revascularised.
To investigate the contractility reserve before revascularisation of a chronic total coronary occlusion (CTO).
Dobutamine stress leads to an increase in systolic wall thickening in viable tissue. Forty-seven patients with a CTO of a coronary artery were included. Segmental wall thickening (SWT) at rest and during dobutamine stress (5 and 10 microg/kg/min) were evaluated. DE-images were performed to calculate the TEI. Segments were scored as dysfunctional if SWT was <45%.
Contractility reserve is present in segments with TEI<50% and 50%–75% although a higher dose was needed when TEI 50%–75%.
This article is published under license to BioMed Central Ltd.