Table 1.

Echocardiographic Measurements before Initiation of Pacing and During Pacing in Wildtype C57BL/6J Mice

	Pre-Pacing (n = 6)	During Pacing (n = 6)
IDD, mm	3.8 ± 0.14	3.6 ± 0.08
IDS, mm	2.1 ± 0.10	2.2 ± 0.12
Fractional Shortening, %	44.2 ± 2.0	37.2 ± 2.8*
AWTs, mm	1.1 ± 0.14	0.85 ± 0.08
AWTd, mm	0.53 ± 0.09	0.47 ± 0.05
PWTs, mm	1.4 ± 0.14	1.2 ± 0.10
PWTd, mm	1.0 ± 0.11	0.85 ± 0.13

Data is presented as group means ± SEM. Comparisons between groups were performed with unpaired T-tests. *, p < 0.05. IDD, IDS, intraventricular dimensions at end-diastole, end-systole; AWTs, AWTd, anterior wall thicknesses at end-systole, end-diastole; PWTs, PWTd, posterior wall thicknesses at end-systole, end-diastole.