Background: Hypertension is one of the most frequent diseases in the world and risk factor for major cardiovascular events like Acute Myocardial Infarction, cerebral Ischemia, arrhythmia, hospitalization and death. It is classified in primary hypertension, when there is no identified cause and secondary hypertension, which is a result of a certain organ damage like heart, kidneys, thyroid, adrenal glands, etc. In the general population, secondary HT affects 5-11% of cases. Primary aldosteronism (PA) is a rare condition characterized by overproduction of aldosterone (mineralocorticoid hormone), as a result of a disorder in the adrenal gland.