A model argument for accurate EF

Background CMR still suffers from several sources of inaccuracy in measuring LV volumes and EF. Typical standard deviations (SD) between readers for EF range from 4% 7.5% (Quantification of LV function: Suinesiaputra A, et al. J Cardiovasc Magn Reson. 2015 Jul 28;17(1):63). Further, since the data range of agreement for 95% of data is 4SD (i. e. 16% 30%), it is common practice to adjust EF based on a visual assessment. This presents several major problems in that there is no guarantee that visual EF is a good guide and that adjustments to EDV and ESV will result in the SV being adjusted correctly. Here we present a technique termed ‘Removing Endocardial Measured Overage Directionally using External Leverage’ (REMODEL) that accomplishes intuitive simultaneous corrections of EF and SV.