- Poster presentation
- Open Access
Comparison of GLS via echocardiography and tissue tracking by Cardiac Magnetic Resonance imaging
© Tantiongco et al; licensee BioMed Central Ltd. 2015
- Published: 3 February 2015
- Cardiac Magnetic Resonance
- Myocardial Function
- Cardiac Magnetic Resonance Imaging
- Global Longitudinal Strain
Global longitudinal strain (GLS), has shown utility in detecting early subclinical LV dysfunction and has demonstrated significant efficacy in evaluating patients for chemotherapy cardiotoxicity. However, echocardiography is often reliant on operator experience and adequate quality windows for assessment. CMR is not subject to limitations of poor image quality due to its superior endocardial definition. We evaluated CMR derived strain by implementing a tissue tracking algorithm and compared it to GLS by 2D echocardiography in a prospective study of chemotherapy patients.
10 patients with breast cancer and receiving cardiotoxic chemotherapy (anthracycline and/or trastuzumab) underwent concurrent transthoracic echocardiography (TTE) for GLS and CMR to assess myocardial function and strain (tissue tracking). 2D TTE was performed by an experienced operator using established techniques (speckle tracking). A novel CMR tissue tracking program (Circle Cardiovascular Imaging Inc) was performed by delineating endocardial and epicardial contours on cine images during diastole in 3 long axis views (VLA, HLA and LVOT) and automated algorithm was applied to derive strain values for each image. These were averaged, to derive global longitudinal strain by CMR and comparison with GLS by TTE was done using Bland-Altman analysis.
CMR derived strain may be used interchangeably with TTE derived GLS. This needs to validated in a larger cohort with a wider range of myocardial dysfunction.
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