Table 2.

Linear regression values for T_Ca-RT50 relations from each age-region group

Region	Age, mo	r2	Slope, ms/ms	Intercept, ms
Endo	6	0.40	0.36	52
	18	0.57	0.59	13
	22	0.55	0.44	36
Mid	6	0.28	0.26	65
	18	0.53	0.40	44
	22	0.37	0.28	61
Epi	6	0.11	0.09*	99
	18	0.59	0.47	20
	22	0.52	0.44	35

Endo, endocardial; Mid, midmyocardial; Epi, epicardial.

^*Significant difference vs. 18 and 22 mo Epi cells (P < 0.05).