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Figure 1 Serial changes in systolic blood pressure in the control, diastolic heart failure (DHF), high-dose amlodipine (administered amlodipine of high dose [HDA]) and low-dose amlodipine (administered amlodipine of low dose [LDA]) rats. Data were obtained at the ages of 7, 13, 15, 17 and 19 weeks. Data are presented as the mean value ± SEM. *p < 0.05 vs. control group; #p < 0.05 vs. DHF group; p < 0.05 vs. high-dose amlodipine group at the same point.