P1484PROGRESSION OF AORTIC ARCH CALCIFICATION IS ASSOCIATED WITH OVERALL AND CARDIOVASCULAR MORTALITY IN HEMODIALYSIS

Abstract

Abstract Background and Aims Vascular calcification is common and associated with unfavorable outcomes among patients with end-stage renal disease (ESRD). However, little is known whether the progression of vascular calcification outweights the baseline calcification in association with overall and cardiovascular (CV) mortality in hemodialysis (HD) patients. Method This study included 140 maintenance HD patients. Vascular calcification was assessed using aortic arch calcification (AoAC) score measured from chest radiographs at the baseline and the second year of follow-up. Progression of vascular calcification (△AoAC) was defined as the difference between the two measurements of AoAC. The association of △AoAC with overall and CV mortality was evaluated using multivariable Cox regression analysis. Results During the mean follow-up period of 7.8 years, there were 49 (35%) overall mortality and 27 (19.3%) CV mortality. High brachial-ankle pulse wave velocity was positively correlated with △AoAC, whereas old age and high hemoglobin were negatively correlated with △AoAC. In multivariate adjusted Cox analysis, increased △AoAC (per 1 unit), but not baseline AoAC, was significantly associated with overall mortality (HR, 1.183; 95% CI, 1.056–1.327; p = 0.004) and CV mortality (HR, 1.194; 95% CI, 1.019–1.398; p = 0.028). Conclusion Progression of AoAC outperformed the baseline AoAC in association with increased risk of overall and CV mortality in HD patients. Regular follow-up of chest radiograph and AoAC score assessments are simple and cost-effective to identify the high-risk individuals of unfavorable outcomes in maintenance HD patients.