So far, there are no treatment recommendations for this group of patients. Material and study plan 120 persons (age 40-60 years old) will be included in the study, patients with stage I or II primary hypertension according to the European Society of Hypertension: Group A- 40 patients without symptoms of heart failure Group B- 40 patients with exertional dyspnoea Group C - 40 patients with overt heart failure