RT Book, Section A1 Ruilope, Luis M. A1 Segura, Julian A2 Lerma, Edgar V. A2 Berns, Jeffrey S. A2 Nissenson, Allen R. SR Print(0) ID 6339026 T1 Chapter 44. Refractory Hypertension T2 CURRENT Diagnosis & Treatment: Nephrology & Hypertension YR 2009 FD 2009 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-144787-4 LK accessmedicine.mhmedical.com/content.aspx?aid=6339026 RD 2024/10/08 AB Blood pressure above the recommended values (140/90 mm Hg) despite the use of greater than or equal to 3–4 antihypertensive agents, each belonging to a different class.Insufficient treatment prescription and lack of adherence to prescribed drugs, dietary restrictions, and lifestyle recommendations are the most frequent causes.Associated with obesity, sleep apnea, diabetes, chronic kidney disease, advanced age, high dietary salt intake, and black race.