Shear-wave amplitudes measured with cardiac MR elastography for diagnosis of diastolic dysfunction
Elgeti T, Knebel F, Haettasch R, Hamm B, Braun J, Sack I (2014)
Publication Type: Journal article
Publication year: 2014
Journal
Book Volume: 271
Pages Range: 681-687
Journal Issue: 3
Abstract
Purpose: To test whether shear-wave amplitudes (SWAs) in the myocardium measured with cardiac magnetic resonance (MR) elastography enable diagnosis of myocardial relaxation abnormalities in patients with diastolic dysfunction. Materials and Methods: Each subject gave written informed consent to participate in this institutional review board-approved prospective study. Electrocardiographically triggered SWA-based cardiac MR elastography with 24.13-Hz external vibration frequency was performed in 50 subjects grouped into asymptomatic young (n = 10, 18-39 years) and asymptomatic old (n = 10, 40-68 years) subjects and patients with echocardiographically proved mild, moderate, or severe diastolic dysfunction (n = 30, 44-73 years). SWA images were analyzed in the left ventricular (LV) region and were normalized against reference SWA of the thoracic wall. Analysis of variance with Bonferroni-corrected pairwise comparison and Pearson correlation were used for statistical evaluation. Results: Young and old control subjects had normalized mean LV SWA of 0.67 ± 0.04 (standard error of the mean) and 0.56 6 0.04 (P =.18, F test), respectively. Compared with the control groups, patients with mild, moderate, and severe diastolic dysfunction displayed significantly reduced normalized mean LV SWA of 0.37 ± 0.04, 0.34 ± 0.04, and 0.29 ± 0.04 (P <.001, F test), respectively, which was inversely correlated to the severity of diastolic dysfunction (R = 20.61, P <.001). The best cutoff value to differentiate between asymptomatic volunteers and patients was 0.43, yielding an area under the receiver operating characteristic curve of 0.92, with 90% sensitivity and 89.7% specificity. Conclusion: LV SWA measured with cardiac MR elastography provides image contrast sensitive to myocardial relaxation abnormalities and shows significantly lower values in patients with diastolic dysfunction. © 2014 RSNA.
Involved external institutions
Germany (DE)How to cite
APA:
Elgeti, T., Knebel, F., Haettasch, R., Hamm, B., Braun, J., & Sack, I. (2014). Shear-wave amplitudes measured with cardiac MR elastography for diagnosis of diastolic dysfunction. Radiology, 271(3), 681-687. https://doi.org/10.1148/radiol.13131605
MLA:
Elgeti, Thomas, et al. "Shear-wave amplitudes measured with cardiac MR elastography for diagnosis of diastolic dysfunction." Radiology 271.3 (2014): 681-687.
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