How Does Regional Hypertrophy Affect Strain Measurements With Different Speckle-Tracking Methods?

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
Monica DobrovieJens-Uwe Voigt

Abstract

In this study, we evaluate the impact of abnormal myocardial shapes, such as regional hypertrophy, on longitudinal strain measurements with different tracking approaches. We selected 40 patients with normal ejection fraction and prominent septal bulge. We assessed longitudinal strain with full wall (FW) tracking, (GE EchoPAC) as well as endo-, mid-, and epicardial (EME) tracking (Tomtec ImageArena), on the same image acquired with a GE machine (using raw data and full frame rate DICOM data, respectively). We used a region of interest (ROI) which follows precisely the endo- and epicardial contours (true contour ROI) and one where the bulging region was excluded (straight ROI). In segments with bulge, absolute segmental longitudinal strain values were in all myocardial layers significantly higher with a straight ROI compared to a true contour ROI, both with FW tracking and EME tracking. The highest difference was found in the endocardial layer (3.4 ± 2.5% and 7.7 ± 7.1%, respectively, both P < 0.001). In the bulged segments, the effect of ROI shape was more pronounced in EME tracking software compared to FW tracking software. Bulged segments also influenced global longitudinal strain measurements, mostly in the endocardial layer ...Continue Reading

Citations

Jan 10, 2020·European Journal of Preventive Cardiology·Stephan Gerling

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