Evaluation of the efficacy and safety of Nebivolol in the treatment of hypertension in adolescents

The aims of the study are: 1. Assessment of the influence of nebivolol on hypertension assessed in ABPM examination and assessment of nebivolol safety in adolescents with hypertension (primary goals) 2. Assessment of the influence of nebivolol on hypertension assessed in oscillometric measurement in adolescents with hypertension, central pressure, parameters of arteries’ functions in adolescents with hypertension, selected biochemical parameters and on the heart rate as well as selected echocardiographic parameters in adolescents with hypertension (secondary goals).