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Interstudy variability in cardiac magnetic resonance imaging measurements of ventricular volume, mass, and ejection fraction in repaired tetralogy of fallot: A prospective observational study.
MedLine Citation:
PMID:  23418153     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: To assess the interstudy variability of cardiac magnetic resonance imaging (CMR) parameters of ventricular size and function in repaired tetralogy of Fallot (TOF). MATERIALS AND METHODS: Patients with TOF (n = 30, median age 23.5 years, 43% male) were enrolled prospectively. Each patient underwent two consecutive CMR examinations on the same day. Each examination was analyzed for ventricular size and function by two observers and multiple comparisons were made with assessment of agreement using Bland-Altman analysis and intraclass correlation coefficients (ICC). RESULTS: Agreement for most measures of ventricular size and function was high when a single observer analyzed both studies. Agreement was worse when different observers analyzed sequential studies. This effect was most prominent on measurements of right ventricular (RV) mass and there was slight improvement when mass was measured during systole. Aside from ventricular mass, agreement was similar for RV and left ventricular (LV) parameters. CONCLUSION: CMR measures of ventricular size and function have acceptable repeatability across serial examinations in patients with repaired TOF. Measurements of RV mass are subject to higher variability. For most parameters, agreement limits are wider when measurements are performed by multiple operators. These results will aid in the interpretation of study-to-study variations in the follow-up of individual patients and in designing future clinical trials. J. Magn. Reson. Imaging 2013;. © 2013 Wiley Periodicals, Inc.
Authors:
Shannon E Blalock; Puja Banka; Tal Geva; Andrew J Powell; Jing Zhou; Ashwin Prakash
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-15
Journal Detail:
Title:  Journal of magnetic resonance imaging : JMRI     Volume:  -     ISSN:  1522-2586     ISO Abbreviation:  J Magn Reson Imaging     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Wiley Periodicals, Inc.
Affiliation:
Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts, USA; Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA.
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