Abstract 1841: Volumetric 3D Echo vs 3D-Guided Biplane 2D Echo for Measurements of LV Parameters
Background: Accurate measurement of LV volumes is a major potential attraction of 3D echo (3DE). In pts with resting wall motion abnormalities, when geometric assumptions of 2DE may not apply, it is unclear whether a volumetric assessment of the LV is required, or whether the main benefit of 3DE is to avoid fore-shortening (ie ensure that the full length of the LV is measured).
Methods: Pts with a history of prior infarction, who presented to the clinical laboratory for evaluation of LV parameters (n=101, 88 men, age 63±10 years) were studied with 2DE, RT3D and MRI. RT3D measurements were obtained a volumetric semi-automated LV border detection based on tracing (3DV) and a 3D guided biplane (3DBP). MRI images were obtained using true FISP during breath-hold, with measurement of 3D volumes and EF.
Results: All echo techniques underestimated LV volumes, but EF estimations were similar (table⇓). The best correlation was between MRI vs. 3DV; however the bias from MRI volumes was less with 3DBP.
Conclusions: Use of 3D-guided biplane Simpson’s appears to confer a similar level of benefit as does full volumetric tracing in patients with resting wall motion abnormalities. The main benefit from 3DE may relate to avoidance of fore-shortening.