LAUSR

Objective: Compare different blood pressure (BP) assessment methods. Design and method: Prospective longitudinal observational study of patients with high BP (HBP) diagnosis. Patients are evaluated at inclusion in the study, after 1 month, 3 months and 1 year. In each evaluation is carried out: sociodemographic and clinical data registry; measurement of peripheral BP (pBP; OMRON M6 2014®) and central BP (cBP; aplanation tonometry with Sphygmocor® system); self-monitoring BP (SMBP) and 24-hour ambulatory BP monitoring (ABPM) registry, regarding previous 6 months if patient remained stable and without therapeutic changes. Were excluded individuals with diagnosis of secondary hypertension, peripheral artery disease, atrial fibrillation or flutter, hospitalization and therapeutic changes in prior 6 months. Controlled BP was defined as: systolic pBP (SpBP) < 140mmHg and diastolic pBP (DpBP) < 90mmHg; systolic cBP (ScBP) < 130mmHg and diastolic cBP (DcBP) < 90mmHg. Results: The sample corresponds to first evaluation during the first month of study: 19 patients, with mean age of 63 ± 10 years, majority male (73.7%), on average with 14 ± 7 years of HBP. Most frequent comorbidities are dyslipidemia (57.9%), type 2 diabetes (36.8%) and smoking (26.3% ex-smokers, 10.5% active smokers). pBP mean values are higher than cBP: SpBP 152 ± 14 vs ScBP 142 ± 15mmHg; DpBP 88 ± 10 vs DcBP 86 ± 13mmHg. Considering cBP, only 10.5% of patients present controlled BP, as opposed to 21.1% if considering pBP. SMBP was obtained in 36.8% of patients and revealed lower BP - SBP 131 ± 10mmHg and DBP 77 ± 10mmHg. As well as ABPM, performed in 26.3% of patients - SBP 126 ± 8mmHg and DBP 81 ± 4mmHg. In the subgroup of patients with SMBP and ABPM, 84.2% and 80% patients, respectively, presented controlled BP. Conclusions: BP differ when obtained by different methods, as well as patients with controlled BP, with a low value considering cBP. Currently cBP seems to be a best predictor of target-organ injury opposed to pBP, but not yet as predictor of cardiovascular events. Authors intend with continuation of the study to relate the values of pBP and cBP with therapy and clinical evolution of the patient, in order to establish the utility of cBP in study and therapeutic orientation of hypertensive patient.