Baseline Data. Ambulatory clinic protocol for patients followed for AHT require clinical evaluation, blood test, electrocardiogram and, eventually, 24 hours ambulatory blood pressure monitoring (AMBP). Data regarding the comorbidities and pharmacotherapy will be collected. Anthropometric data regarding adiposity and vital signs will be registed and body mass index calculated as weight (kg) divided by height (m) squared. Blood pressure will be measured in a quiet room with semiautomatic device (Omron HEM-907XL, Omron Healthcare, Bannockburn, Illinois, USA) with an appropriate cuff according with the established recommendations. If necessary 24 hours ABPM will be performed using an ABPM device - Spacelabs model 90207 (Issaquah, Washington, USA) also according with current guidelines. Electrocardiogram will be performed per institutional protocol with a Page Writer TC 30, Philips, Eindhoven, Netherlands. The analytical screening evaluation includes complete blood count, haematocrit, urinalysis, urine microalbumin, serum sodium, potassium, creatinine (estimated or measured glomerular filtration rate [GFR]), and calcium, uric acid, glycated haemoglobin, lipid profile following a 9- to 12-hour fast (total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triglycerides), thyroid-stimulating hormone and brain natriuretic peptide.