Fig. 3

Comparison of various echo methods to estimate ejection fraction and LV mass. Means ±SEM of calculated ejection fractions either using M-mode SAX view (X-axis) or three-dimensional reconstruction of stacked LV short axis (3DSAX) views (Y-axis) were plotted for each time point (red; months) for sham (a and c) and AR (b and d) groups. The oblique solid line represents the expected results if both methods were equivalent. In panels e and f are shown the correlation of estimated LV mass by echo (Y-axis) compared to wet LV weights obtained at the end of the protocol at 6 months. Two equations described in the Methods section were used to estimate LV mass in blue and red, respectively. Slope ± SEM for each regression line is indicated. The oblique solid line represents the expected results if methods were equivalent