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CCP and CCP/MAP changes in young and old Brown-Norway rats^*

	1.5 V		3 V		4.5 V
Species/Treatment	CCP cm H₂O	CCP/MAP	CCP cm H₂O	CCP/MAP	CCP cm H₂O	CCP/MAP

Young/EFS	41.07 ± 8.18	0.806 ± 0.138	64.66 ± 5.08	0.816 ± 0.072	70.50 ± 7.10	0.875 ± 0.082
Old/EFS	27.19 ± 6.61 ${dagger}$	0.227 ± 0.094 ${dagger}$	42.33 ± 5.74 ${dagger}$	0.5384 ± 0.065 ${dagger}$	33.20 ± 4.16 ${dagger}$	0.586 ± 0.023 ${dagger}$
Old + Y-27632/EFS	51.14 ± 7.87 ${ddagger}$	0.678 ± 0.123 ${ddagger}$	64.51 ± 1.23 ${ddagger}$	0.762 ± 0.051 ${ddagger}$	65.58 ± 12.87 ${ddagger}$	0.852 ± 0.050 ${ddagger}$
Old + ZAP + Y-27632/EFS	66.21 ± 8.52 $§$	0.85 ± 0.01 $§$	84.69 ± 10.34 $§$	0.97 ± 0.07 $§$	76.19 ± 6.53 $§$	0.95 ± 0.03 $§$

*CCP indicates corpus cavernosum pressures; MAP, mean arterial pressure; EFS, electrical field stimulation; and ZAP, zaprinast.
${dagger}$ P < .05 when compared with young group.
${ddagger}$ P < .05 when compared with untreated old group.
$§$ P < .05 when compared with untreated old group.