Table 1. Echocardiographic parameters.

Anesthetized mice were analyzed with a Vevo 2100 ultrasound system. Parameters shown were derived by tracing the images of the left ventricle at systole and diastole. F233Δ mice showed no significant difference from WT in any of the parameters shown; n= 9, p>0.05 for all comparisons by unpaired two-tailed t test.

	WT	F233Δ
Stroke Vol, μL	41.7 ± 1.2	40.8 ± 2.1
Ejection Fraction, %	53 ± 3	55 ± 2
Left Ventricular (LV) Mass, mg	114.0 ± 4.7	111.5 ± 8.2
LV volume, μL (diastole)	79.4 ± 2.8	76.3 ± 5.5
LV volume, μL (systole)	38.1 ± 3.2	35.6 ± 3.9