Abstract 19684: Comparison of Left Ventricular Function and Mass Assessment on Everyday Echocardiography and Cardiac Magnetic Resonance Imaging
Background: Cardiac magnetic resonance (CMR) is known to be the most accurate method of assessing left ventricular (LV) systolic function and myocardial mass. As echocardiography (echo) is the most widely used method of assessing these parameters, we compared the parameters of LV systolic and diastolic function and mass on everyday echo and CMR in a large group of consecutive patients studied for all purposes.
Methods: We retrospectively reviewed 308 consecutive patients (65% male; mean age 54±17 years) studied by echo and CMR within a month of each other for all purposes. LV ejection fraction (LVEF) and LV mass index (LVMI) assessed by the modified method of disks on 2-D echo and CMR and E and A wave velocities and the value of deceleration time (DT) of mitral inflow obtained by Doppler echo and phase-contrast CMR were compared. Correlations between the LVMI on CMR and left atrial volume index (LAVI) calculated by the area-length method on 2-D echo and E/e' ratio on Doppler echo were also evaluated.
Results: There were good agreements in LVEF and LVMI between echo and CMR measurements (interclass correlation coefficient 0.90 and 0.82 for LVEF and LVMI, respectively, p<0.001), but echo significantly underestimated the LVEF (56.4±14.59 vs. 60.5±18.17%, p<0.001) and overestimated LVMI (101.6±36.55 vs. 71.9±28.54 mg/m2, p<0.001). The E/A ratio and DT showed moderate correlation (r=0.620, 0.390, respectively, p <0.001), and there were significant differences in absolute values (echo vs. CMR: 1.14±0.744 vs. 1.36±0.826 for E/A ratio, 224±76.0 vs. 178±43.3 msec for DT, p <0.001). LVMI on CMR showed significant correlation with LAVI and E/e' ratio on echo (r=0.488, 0.354, respectively, p<0.001).
Conclusion: There are significant differences in absolute values of LV systolic and diastolic parameters as well as LVMI on everyday echo and CMR. E/e' and LAVI are significantly associated with LVMI on CMR.
- © 2010 by American Heart Association, Inc.