Accuracy of A New Method for Semi-Quantitative Assessment of Right Ventricular Ejection Fraction by Cardiac Mri: Right Ventricular Fractional Diameter Changes

Emmanuelle Vermes,Nicolas Rebotier,Olivier Genee,Julien Pucheux,Anne Delhommais,Daniel Alison

European Journal of Radiology（2013）SCI 2区SCI 3区

Cited 6|Views15

Abstract

Objective: Longitudinal shortening is traditionally considered the predominant part of global right ventricular (RV) systolic function. Less attention has been paid to transverse contraction. The aim of this study was to evaluate RV transverse motion by cardiovascular magnetic resonance (CMR) in a large cohort of patients and to assess its relationship with RV ejection fraction (RVEF).Study design: We retrospectively analyzed the CMR scans of 300 patients referred to our center in 2010. RVEF was determined from short axis sequences using the volumetric method. Transverse parameters called RV fractional diameter changes were calculated after measuring RV diastolic and systolic diameters at basal and mid-level in short axis view (respectively FBDC and FMDC). We also measured the tricuspid annular plane systolic excursion (TAPSE) as a longitudinal reference.Results: Our population was divided into 2 groups according to RVEF. 250 patients had a preserved RVEF (>40%) and 50 had a RV dysfunction (RVEF <= 40%). Transverse and longitudinal motions were significantly reduced in the group with RV dysfunction (p < .0001). After ROC analysis, areas under the curve for FBDC, FMDC and TAPSE, were respectively 0.79, 0.82 and 0.72, with the highest specificity and sensitivity respectively of 88% and 68% for FMDC (threshold at 20%) for predicting RV dysfunction. FMDC had an excellent negative predictive value of 93%.Conclusion: RV fractional diameter changes, especially at the mid-level, appear to be accurate for semi-quantitative assessment of RV function by CMR. A cut-off of 20% for FMDC differentiates patients with a low (EF <= 40%) or a preserved RVEF. (C) 2013 Elsevier Ireland Ltd. All rights reserved.

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Key words

Cardiovascular Magnetic Resonance,Short Axis,Short Axis View,Transverse Motion,Right Ventricular Ejection Fraction

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