Table 1.

Echocardiographic Studies of Cx43 Conditional Knockout (MHC-CKO) Mice

	Cre−, flox/flox (n=4)	MHC-CKO (n=6)
IDD, mm	3±0.2	3±0.1
IDS, mm	1.6±0.2	1.7±0.1
FS, %	46.3±4	45±2.9
LV diastolic volume, μL	28±4	28±3
LV systolic volume, μL	5±2	5±1
EF, %	83.7±4.8	82.6±2.6
AWTs, mm	1.5±0.1	1.4±0.1
AWTd, mm	0.9±0.1	0.9±0.1
PWTs, mm	1.2±0.1	1.2±0.1
PWTd, mm	0.9±0.1	0.9±0.1
HR, bpm	525±9	462±37
Age, wk	5	5
Weight, g	20.3±0.6	21.0±0.4

P=NS for all of the above comparisons. IDD indicates intraventricular dimension in diastole; IDS, intraventricular dimension in systole; FS, fractional shortening; LV, left ventricle; AWTs, anterior wall thickness in systole; AWTd, anterior wall thickness in diastole; PWTs, posterior wall thickness in systole; PWTd, posterior wall thickness in diastole; and HR, heart rate.