The study, multi-center balanced, parallel group (two treatment arms), randomized, double-blind (double-dummy), non-inferiority study is designed to show non-inferiority of Sevikar® (olmesartan(OM)/amlodipine (AM)) 40/10 mg compared to the combination of Perindopril (PER) 8 mg plus Amlodipine 10 mg with regard to central systolic blood pressure lowering effect, using the change from baseline (Week 0) to final examination (Week 24).