Article Text

PDF

Hypertension
Association of haemoglobin with ambulatory arterial stiffness index in untreated essential hypertensive patients without anaemia
  1. HuiMin Chen,
  2. Qi Hua,
  3. HaiXia Hou
  1. Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, China

Abstract

Objective Increased haemoglobin (Hb) levels are known to be associated with increased cardiovascular events and mortality in hypertensive patients, but the underlying mechanism remains unclear. Meanwhile, increased Ambulatory Arterial Stiffness Index (AASI), the surrogate maker of arterial stiffness, has been proved to be an independent predictor of cardiovascular disease. This pilot study evaluated the association between Hb and AASI in untreated essential hypertensive patients without anaemia.

Methods A total of 566 untreated essential hypertensive patients without anaemia were divided into normal-Hb and high-Hb groups according to their Hb levels. The AASI and its symmetric calculation (sym_AASI) were derived from 24 h-Ambulatory Blood Pressure Monitoring (24 h-ABPM). A multivariable linear regression analysis was performed to determine the relationship between Hb and AASI, Sym_AASI.

Results High-Hb group (n=127) showed higher AASI and Sym_AASI (0.51±0.11 vs 0.43±0.12, p<0.001; 0.33±0.10 vs 0.27±0.08, p<0.001) compared to normal-Hb group (n=439). Univariate correlation analysis showed Hb levels were positively related to AASI and Sym_AASI values (r=0.459, p<0.001; r=0.353, p<0.001). After adjustment for age, sex, BMI, current smoker, eGFR, uric acid, total cholesterol, high-density lipoprotein, 24 h-SBP, 24 h-PP and dipper status, Hb persisted as a independent determinant of AASI and Sym_AASI (β=0.402, p<0.001 and β=0.298, p<0.001, respectively).

Conclusion High haemoglobin seems be to associated with increased AASI in untreated essential hypertensive patients without anaemia.

Statistics from Altmetric.com

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.