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The International Journal of Cardiovascular Imaging

Published in:

01-03-2013 | Original Paper

Impact of right ventricular endocardial trabeculae on volumes and function assessed by CMR in patients with tetralogy of Fallot

Authors: Hendrik G. Freling, Kees van Wijk, Karolien Jaspers, Petronella G. Pieper, Karin M. Vermeulen, Jeroen M. van Swieten, Tineke P. Willems

Published in: The International Journal of Cardiovascular Imaging | Issue 3/2013

Abstract

The objective of this study was to assess the impact of right ventricular (RV) trabeculae and papillary muscles on measured volumes and function assessed by cardiovascular magnetic resonance imaging in patients with repaired tetralogy of Fallot. Sixty-five patients with repaired tetralogy of Fallot underwent routine cardiovascular magnetic resonance imaging. Endocardial and epicardial contours were drawn manually and included trabeculae and papillary muscles in the blood volume. Semi-automatic threshold-based segmentation software excluded these structures. Both methods were compared in terms of end-diastolic, end-systolic and stroke volume, ejection fraction and mass. Observer agreement was determined for all measures. Exclusion of trabeculae and papillary muscle in the RV blood volume decreased measured RV end-diastolic volume by 15 % (from 140 ± 35 to 120 ± 32 ml/m²) compared to inclusion, end-systolic volume by 21 % (from 74 ± 23 to 59 ± 20 ml/m²), stroke volume by 9 % (from 66 ± 16 to 60 ± 16 ml/m²) and relatively increased ejection fraction by 7 % (from 48 ± 7 to 51 ± 8 %) and end-diastolic mass by 79 % (from 28 ± 7 to 51 ± 10 g/m²), p < .01. Excluding trabeculae and papillary muscle resulted in an improved interobserver agreement of RV mass compared to including these structures (coefficient of agreement of 87 versus 78 %, p < .01). Trabeculae and papillary muscle significantly affect measured RV volumes, function and mass. Semi-automatic threshold-based segmentation software can reliably exclude trabeculae and papillary muscles from the RV blood volume.

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Title: Impact of right ventricular endocardial trabeculae on volumes and function assessed by CMR in patients with tetralogy of Fallot
Authors: Hendrik G. Freling
Kees van Wijk
Karolien Jaspers
Petronella G. Pieper
Karin M. Vermeulen
Jeroen M. van Swieten
Tineke P. Willems
Publication date: 01-03-2013
Publisher: Springer Netherlands
Published in: The International Journal of Cardiovascular Imaging / Issue 3/2013
Print ISSN: 1569-5794
Electronic ISSN: 1875-8312
DOI: https://doi.org/10.1007/s10554-012-0112-7

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