Table 1.

Summary of physiological parameters.

	3 months		8 months		12 months		18 months
	Wistar	GK	Wistar	GK	Wistar	GK	Wistar	GK
Heart weight (g)	2.3 ± 0.5	1.6 ± 0.1	1.9 ± 0.2	2.2 ± 0.2	2.1 ± 0.3	2.4 ± 0.2	2.1 ± 0.3	2.6 ± 0.3
Body mass (g)	478.9 ± 83	276.8 ± 16.1	457.6 ± 33.2	409.5 ± 32.8	592.8 ± 82	435.8 ± 37.4	642.2 ± 63.6	450.6 ± 37.4
Heart/body %	0.521	0.586	0.420	0.542*	0.362	0.559*	0.327	0.587*

Body mass was recorded prior to excision of the heart. Heart mass was measured following isolated Langendorff heart preparation. Data are represented as mean ± SEM, n ≥ 18.

*P < 0.05 vs. counterpart Wistar at each age group. One-way ANOVA was used to determine statistical significance.