“…Treatment-resistant HTN is a clinical situation when properly administered pharmacotherapy consisting of three or more drugs in optimal, best-tolerated doses and lifestyle modification fail to reduce systolic blood pressure and diastolic blood pressure values to < 140 mmHg and/or < 90 mmHg, respectively, as confirmed by 24-hour BP measurement or home BP measurements [4,5]. Patients require frequent internal medicine follow-up resulting from the high risk of developing HTN-dependent organ complications, including left ventricular hypertrophy, the development of arteriosclerosis with all its complications, and impaired renal function [4,5]. Efforts should be made to establish good cooperation with the patient, as the regular intake of medications in appropriate doses is essential to gain control over the course of the disease.…”