Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Female or male adult patients with arterial hypertension and admission diagnosis of "resistant hypertension"
Informed consent
Exclusion of secondary arterial hypertension
Kidney function (estimated glomerular filtration rate \[eGFR\] ≥ 45 ml/min/1.73 m2)

Age \< 18 years
Secondary arterial hypertension
Type 1 Diabetes mellitus
Unstable coronary heart disease, myocardial infarction or stroke in the last 6 months
Psychiatric diseases
Significant carotid stenosis (\> 70%)
Pregnancy
Chronic kidney disease (eGFR \< 45 ml/min/1.73 m2)
Severe liver injury (elevation of transaminases more than twofold the upper limit of normal)
Abuse of alcohol or illegal drugs

Medication Adherence and "True" Resistance in Patients With Resistant Hypertension