Refractory And Resistant Hypertension: Characteristics And Differences Observed In A Specialized Clinic

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Resistant hypertension (RH) is defined as uncontrolled blood pressure (BP) despite the use of >= 3 anti-hypertensive drugs, or controlled requiring use of >= 4 drugs. Recently, a new definition for an extreme phenotype of RH (uncontrolled BP using at least five drugs) has emerged-the refractory hypertension (RfH). Although characteristics of RH are well established, little is known about this newly described subgroup. For this work, 116 subjects with RH were enrolled from a specialized clinic and divided into RH (n = 80) and RfH (n = 36). Subjects were submitted to echocardiography, 24-hour ambulatory BP measurement and biochemical analyses. Logistic regression analysis demonstrated that: (1) white coat effect (odds ratio [OR], 3.23; 95% confidence interval [CI], 1.12-9.27; P = .03), (2) black race (OR, 6.67; 95% CI, 1.99-16.16; P < .001), and (3) left ventricular mass index (OR, 1.02; 95% CI, 1.01-1.03; P = .04) were independent predictors of refractoriness. In conclusion, RfH and RH present different patient characteristics, and these phenotypic aspects can be useful for better understanding this harder-to-treat subgroup. 2015 American Society of Hypertension. All rights reserved.95397402Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq