Table 1.

Tissue ATP Content in Mature and Aged Male and Female Hearts at 15 Minutes of Reperfusion

	ATP μM/g Dry Weight				Probability
	Mature Male	Mature Female	Aged Male	Aged Female	Age	Gender	Age × Gender	Mature Male vs Female	Aged Male vs Female
Control	23.0 (1.4)	22.6 (1.2)	22.4 (1.5)	22.8 (1.5)	0.8794	0.9977	0.7902	0.8390	0.8612
GI	9.0 (1.2)	9.6 (0.8)	7.5 (1.0)	6.8 (1.0)	0.0397	0.9582	0.5652	0.7079	0.6650
K/Mg	11.7 (0.9)	11.4 (1.2)	8.6 (0.7)	7.8 (0.4)	0.0004	0.4984	0.8387	0.7880	0.3645
K/Mg + DZX	12.2 (1.0)	13.5 (0.8)	9.4 (0.7)	7.6 (0.4)	<0.0001	0.7354	0.0497	0.3240	0.0452

Mature and aged, male and female tissue ATP concentration content (μM/g dry weight) for Control (after 75 minutes of perfusion) and in GI, K/Mg and K/Mg + DZX after 30 minutes of equilibrium, 30 minutes of ischemia. 15 minutes of reperfusion. All results are shown as mean (SEM) for n = 6 animals for each group. P values for specific comparisons between male and female animals, within an age group were calculated using a t test. Significant differences at p < 0.05 are shown in bold face.

ATP = adenosine triphosphate; DZX = diazoxide; GI = global ischemia; K/Mg = potassium/magnesium.