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Volumetric measurements in patients with corrected tetralogy of Fallot: comparison of short-axis versus axial cardiac MRI and echocardiography.
MedLine Citation:
PMID:  25348475     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Patients with corrected tetralogy of Fallot (cToF) are prone to develop pulmonary regurgitation and right ventricular enlargement resulting in long-term complications, thus correct right ventricular volumetric monitoring is crucial. However, it remains controversial which cardiovascular magnetic resonance imaging (CMRI) slice orientation is most appropriate in cToF for the analysis of the right ventricular volume.
PURPOSE: To investigate which slice orientation is most suited for right ventricular volumetry in cToF we compared short-axis and axial slices, and furthermore we compared right ventricular data between CMRI and echocardiography.
MATERIAL AND METHODS: Thirty CMRI examinations of 27 patients with cToF were included retrospectively. Right ventricular end-diastolic (EDV) and end-systolic volume (ESV) were derived from short-axis and axial cine CMRI planes. Furthermore, pulmonary trunk forward flow in phase-contrast CMRI and right ventricular inner diastolic diameter in echocardiography (R VIDdiast) were measured. By Bland-Altman and variance analysis intra- and inter-observer agreement were assessed for cine CMRI data. By Pearson correlation CMRI cine and phase-contrast data and CMRI cine and echocardiographic data were compared.
RESULTS: Intra- and inter-observer variability for right ventricular EDV were significantly lower in axial slices (P = 0.016, P = 0.010). For right ventricular ESV a trend towards a lower intra- and inter-observer variability in axial slices was found (P = 0.063, P = 0.138). Right ventricular stroke volume in short-axis (r = 0.872, P < 0.001) and in axial (r = 0.914, P < 0.001) planes correlated highly, respectively very highly with pulmonary trunk forward flow in phase-contrast CMRI. R VIDdiast correlated highly with right ventricular EDV assessed by short-axis and axial CMRI (P < 0.001, P < 0.001).
CONCLUSION: Due to lower intra- and inter-observer variability, axial slices are recommended for right ventricular volumetry in cToF.
Authors:
Juliane Schelhorn; Ulrich Neudorf; Haemi Schemuth; Felix Nensa; Kai Nassenstein; Thomas W Schlosser
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-27
Journal Detail:
Title:  Acta radiologica (Stockholm, Sweden : 1987)     Volume:  -     ISSN:  1600-0455     ISO Abbreviation:  Acta Radiol     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-28     Completed Date:  -     Revised Date:  2014-10-29    
Medline Journal Info:
Nlm Unique ID:  8706123     Medline TA:  Acta Radiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© The Foundation Acta Radiologica 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.
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