Primary hyperaldosteronism is a condition directly related to arterial hypertension, being the first etiology of secondary origin; given the low suspiciousness the diagnosis is not frequently made, however it has a few steps in the diagnostic protocol that includes measurement of renin aldosterone activity, confirmatory tests such as the saline test and imaging studies such as tomography of the adrenal glands; management can be medical or surgical, impacting on the control of blood pressure and a great number of related pathologies such as atrial fibrillation, obesity and obstructive hypopnea sleep apnea, reducing the high morbidity and mortality of these associated conditions, so it is very important to recognize screening measures and diagnosis of primary hyperaldosteronism.