Objective: to assess cardiovascular risk of patients treated at basic health units Design and method: Prospective cohort of 1000 patients over 18 years selected in 21 primary care units in the city of Rio de Janeiro. At the initial consultation, the clinical form was filled out, in which medical history, socioeconomic variables, data on life habits and functional assessment were documented. The definition of HTN was bases on data from medical records. Results: A total of 1014 patients were included in the study. Of these, 737 patients had a diagnosis of Hypertension, which corresponds to 72.68% of the sample. The presence of target organ damage and/or clinical cardiovascular disease, characterizing a high cardiovascular risk population, was found in 103 patients (10.2%) of the studied population. Among them, 95 (12.9%) were from the hypertensive group and 08 (2.9%) from the non-hypertensive group. Cardiovascular risk was calculated according to the number of risk factors and the presence of target organ damage and/or clinical cardiovascular disease, in accordance with the guidelines of the SAH Guidelines of the SBC 1. In the hypertensive population of the study, 40.4% were considered low risk and 42.5% high risk, as can be seen in the attached table. At the end of 12 months, the presence of hospitalization or death was 8.3% (N = 61) in the hypertensive population and 5.8% (N = 16) in the population without SAH (p = 0.18 ). Among hypertensive patients, there were 20 cardiovascular events (2.7%) and 3 (1.1%) in non-hypertensive patients (p = 0.156), with an odds ratio of 2.54 (95% CI 0.74-13.48). Deaths occurred in 1.9% (N = 19) of the study population, 2% (N = 15) of hypertensive individuals and 1.4% (N = 4) of non-hypertensive individuals (p = 0.795). Conclusions: Cardiovascular events accounted for approximately one third of the total events, characterized by hospitalization or death, in patients with hypertension. Although not significant, the cardiovascular risk was almost three times higher in the hypertensive group when compared to the non-hypertensive group, corresponding to 8.3% of the hypertensive population and 5.8% of the population without hypertension.