Abstract
Polycythemia is characterized by increased blood viscosity and a chronic inflammatory state possibly giving rise to excessive thromboembolic events and hypertensive cardiovascular disease. We aimed to study the relationship between polycythemia and cardiac risk factors using a large national registry. Patients more than 18 years with a diagnosis of polycythemia were identified from the National Inpatient Sample 2009-2010 database using International Classification of Diseases; Ninth Edition (ICD-9) code 238.4. Demographics, cardiac risk factors, and cardiovascular events were identified. Polycythemia was present in 0.1% (n = 37 922) of hospital-discharged patients. Patients with polycythemia had a significantly increased prevalence of all cardiac risk factors and events, except for diabetes mellitus and chronic kidney disease. Hypertension was more prevalent in polycythemia compared to controls (61 vs. 46%; P < 0.0001). After adjusting for age, sex, race, diabetes mellitus, hyperlipidemia, tobacco use, obesity, coronary artery disease, heart failure, and chronic kidney disease, polycythemia was still a determinant of hypertension [1.37 (1.28-1.45); P < 0.001]. Polycythemia had high prevalence of all cardiac risk factors and was...Continue Reading
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